Plant Profile & Key Characteristics
Overview: A fast, twining herbaceous vine climbing 1-5 m (3-18 ft), perennial in warm climates and grown as an annual where cold. It is a popular ornamental for its cheerful flowers in orange, yellow, red, pink or white, each marked by a dark central eye.
Quick Specifications
| Specification | Attribute |
|---|---|
| Plant Type / Life Cycle | Herbaceous perennial vine (grown as an annual in cold climates) |
| Foliage Type | Evergreen where mild; annual where frosted |
| Mature Size | 1-5 m (3-18 ft) climbing |
| Growth Rate | Fast |
| Hardiness | USDA zones 9+ as a perennial, 5+ as an annual |
Growth Form & Structure
- Height and Spread: Twines 1-5 m (3-18 ft) up a support; excellent in containers with a small trellis or trailing from a hanging basket.
- Growth Habit and Form: Slender twining climber that needs a trellis, wires or netting to scramble over.
- Lifespan and Maturity: A fast grower that flowers within its first season and blooms freely all season long.
Anatomy & Physical Features
- Leaves and Foliage: Green, triangular-to-elliptic leaves with wavy margins on twining stems.
- Flower Characteristics: Five-petalled flat flowers in orange, yellow, red, pink or white, usually centred on a dark ‘black eye’.
Primary Uses & Landscape Value
- Functional and Ornamental Roles: Ornamental flowering climber for trellises, fences, arches, containers and hanging baskets; quick summer cover in any climate.
Care Guide: Planting, Soil & Watering
Overview: Black-eyed Susan vine is a fast-growing twining vine grown as a tender perennial in warm climates (hardiness zone 9 and up) or a summer annual in colder ones (zone 5 and up). It thrives in full sun (part shade in hot regions) with moist, well-drained soil and steady moderate watering, and needs a trellis to climb.
Quick Care Requirements
| Requirement | Ideal Condition |
|---|---|
| Planting Season | Spring, summer or autumn (after frost) |
| Growth Rate | Fast |
| Soil Type | Rich, moist, well-drained soil |
| Water Need | Moderate — keep evenly moist |
Planting & Establishment
- Best Planting Season: Plant from spring through autumn once frost has passed; where winters are cold, grow it as a warm-season annual.
- How to Plant:
- Hole Preparation: Dig a hole about twice the width of the root ball near a trellis or support, and loosen the surrounding soil.
- Soil Amendments: Work compost or organic matter into the backfill to give this hungry vine a rich, moisture-retentive yet free-draining bed.
- Planting Depth: Set the root ball level with the surrounding soil and keep the stem base unburied; provide support for the twining stems from the start.
- Growth Speed & Expectations: Grows fast, quickly covering a trellis, fence or pot edge (1–5 m) in a single season.
Soil, Watering & Drainage Care
- Soil Mix & Drainage Needs: Rich, moist, well-drained soil or a good potting mix in containers is ideal; steady moisture with free drainage keeps it flowering.
- Watering Schedule & Technique:
- Young / Newly Planted: Keep the soil evenly moist while the young vine establishes and starts to climb.
- Established: Water regularly to keep the soil consistently moist, especially in containers, without waterlogging.
- Seasonal Adjustments: Water more in summer heat and in pots, and less in cool weather as growth slows.
Climate, Light & Hardiness
Black eyed Susan vine is a fast-growing twining vine that persists as a perennial in warm, frost-free climates but is grown as a heat-loving summer annual further north; it prefers full sun, with light shade appreciated in very hot climates. Its foliage and stems are frost-tender and are killed back by freezing temperatures.
Quick Climate Specifications
| Climate Zones | Mediterranean, desert, subtropical, temperate, tropical |
| USDA Hardiness Zones | 9+ as a perennial; 5+ as a warm-season annual (per site data) |
| Cold Damage Begins | Foliage and stems suffer as temperatures approach freezing |
| Frost Tolerance | Low |
| Light Conditions | Full Sun (Half Shade in hot climates) |
Sunlight & Light Exposure
Optimal Light Setup
Full sun for the most vigorous growth and flowering.
Direct Sun Requirement
Needs strong light to bloom well; in very hot climates, afternoon half shade prevents stress.
Shade & Heat Management
In hot-summer regions, some afternoon shade helps keep the vine from wilting during peak heat.
Temperature Extremes & Hardiness
USDA Hardiness & Regional Limits
Persists as a perennial vine in essentially frost-free areas (zone 9 and warmer). In zone 5–8, the top growth is killed by winter frost each year, so it is grown as a warm-season annual, typically restarted from seed or transplants each spring.
Cold Damage & Winter Protection
Frost blackens and kills foliage and stems; in borderline zones a heavy mulch may allow roots to survive a mild winter even where top growth is lost.
Frost Sensitivity
Low frost tolerance - even a light frost damages the vine.
Extreme Heat Tolerance
Tolerates heat well as a warm-season vine, provided it gets regular water.
Wind, Humidity & Microclimate
Wind Tolerance
Moderate; benefits from a trellis or support structure in exposed, windy sites since it is a twining climber.
Microclimate Recommendations
A warm, sheltered, sunny spot with something to climb suits it best; in marginal zones, a south-facing wall adds useful winter warmth.
Growing in Pots, Balconies & Indoors
Black-eyed Susan vine (Thunbergia alata) is a fast, sun-loving climber, not a houseplant – the grower confirms it will not grow indoors as one. In a large pot with a support, though, it is a superb container plant, quickly covering a trellis or trailing from a basket on a sunny balcony or patio.
Quick Details
- Container Size: A large pot of about 10-20 L (2.6-5 gal) to fuel its fast growth; add a trellis or obelisk
- Indoor Suitability: Not a houseplant – it needs full sun and room to climb, which indoors cannot give
- Best Spot: Full sun (light shade in very hot climates), with a support to climb or a basket to trail from
- Soil & Drainage: Rich, free-draining potting mix kept evenly moist
- Watering in Pots: Water regularly – a fast, leafy climber in a pot dries out quickly
Indoors & On the Windowsill
- Houseplant limits: The grower marks it as not an indoor plant; deep in a room the light is far too weak for this sun-lover to flower.
- Overwintering: It is a tender perennial usually grown as an annual; in cold climates it can be cut back and overwintered in a frost-free, bright spot, or simply resown each year.
On a Balcony or Patio
- Light, support & wind: Give it the sunniest spot and a trellis, obelisk or railing to climb; on an exposed balcony shelter it from strong wind and keep the pot well watered, as reflected heat dries it fast.
- Trailing option: It also looks great tumbling from a hanging basket where there is nothing to climb.
Choosing the Pot, Soil & Long-Term Care
- Pot & drainage: A large 10-20 L pot with strong drainage supports vigorous climbing growth. Use strong drainage holes and skip a standing water saucer, which invites root rot; terracotta breathes and dries fast, while glazed or plastic pots hold moisture longer.
- Potting mix: A light, aerated mix – potting compost, or peat/coir with added perlite or vermiculite for drainage.
- Feeding: Feed regularly through the growing season to keep a fast climber flowering, as pots leach nutrients quickly.
- Repotting: Pot on or refresh the mix each season; if kept as a perennial, cut back hard and top up with fresh mix at the start of growth.
Fertilizing & Feeding
A moderate feeder: balanced feeding through the growing season fuels this vine’s fast climbing growth and long bloom show, then feeding stops as growth slows for the year.
Quick Fertilizing Specs
| Feeding Level | Moderate feeder |
|---|---|
| Main Nutrient Priority | Balanced feeding with adequate nitrogen to fuel fast climbing growth |
| Best Feeding Period | Through spring, summer, and autumn active growth and bloom |
| Organic Options | Compost worked into the soil or container mix at planting |
| Reduce/Stop Feeding | Stop feeding as growth slows going into the cooler part of the year |
| Micronutrients | A balanced complete fertilizer covers routine trace needs for most plantings |
| Soil pH | Near neutral, well-drained soil |
Feeding by Growth Stage
Newly planted vine
Help a newly planted vine root in and start climbing.
| Nutrient direction | A balanced complete fertilizer, kept light, plus compost worked into the soil. |
|---|---|
| Timing | At planting and through the first weeks of establishment. |
| Frequency | Light feeding as the vine gets established. |
| Fertilizer types | A balanced complete fertilizer, Compost worked into the soil or container mix |
| Precautions | Keep feeding light at first; this vine grows quickly once it is rooted in. |
Active climbing growth and bloom
Fuel vigorous climbing growth and a long season of flowers.
| Nutrient direction | A balanced complete fertilizer with adequate nitrogen to support fast growth. |
|---|---|
| Timing | Through spring, summer, and into autumn while the vine is actively growing and blooming. |
| Frequency | Regular light feedings through the growing season. |
| Fertilizer types | A balanced complete fertilizer supplying trace nutrients, A diluted liquid feed for container plantings |
| Precautions | This vine grows aggressively; avoid overfeeding with nitrogen, which pushes foliage at the expense of bloom. |
Cool-season rest or decline
Let the vine rest or decline naturally as the growing season ends.
| Nutrient direction | None – withhold fertilizer as growth slows for the year. |
|---|---|
| Timing | Autumn into winter, or as a cold-climate planting declines at the end of its annual cycle. |
| Frequency | No feeding at this stage. |
| Fertilizer types | No feeding at this stage; do not fertilize a vine that has stopped active growth. |
| Precautions | Do not fertilize now; feeding a plant that is not actively growing offers no benefit and can encourage tender growth right before cold weather. |
Nutrient Deficiency Signs & Corrections
Leaves fade to pale green and climbing growth slows noticeably.
| Possible causes | low available soil nitrogen, poor, sandy or heavily leached soil, infrequent feeding for a fast-growing vine |
|---|---|
| Appears first on | older leaves |
| What to check | recent feeding history, soil quality, how quickly the vine is putting out new growth |
| Possible correction | Resume regular balanced feeding with adequate nitrogen through the growing season. |
Flowering is sparse or blooms are smaller than expected despite healthy foliage.
| Possible causes | low soil potassium, a fertilizer program overly weighted toward nitrogen, stressed or restricted roots limiting nutrient uptake |
|---|---|
| Appears first on | flower number and size |
| What to check | fertilizer type and balance used, root space, especially in containers, overall plant vigor |
| Possible correction | Switch to a balanced fertilizer and make sure roots have room and good drainage. |
Leaf edges brown or scorch, especially on container-grown plants, despite regular watering.
| Possible causes | fertilizer salt buildup in a container or bed, under-watering that concentrates salts, excessive or too-frequent feeding |
|---|---|
| Appears first on | leaf margins and tips |
| What to check | recent fertilizer amounts, watering consistency, drainage, especially in containers |
| Possible correction | Ease off feeding and water thoroughly to flush salts, then return to lighter feeding. |
Pruning, Training & Seasonal Maintenance
Black-eyed Susan vine is a fast-growing, soft-stemmed twining vine trained onto a trellis, not a woody climber, so pruning tolerance is moderate to high and mostly about keeping it within its support rather than building a permanent framework. Where it survives as a perennial (zone 9+), the recorded autumn–winter pruning window is best used for a cutback of tangled or cold-damaged growth; where it is grown as an annual (zone 5+) it is simply removed at season’s end. Because it flowers continuously on new growth through spring, summer and autumn, light shaping during the season barely dents the current display, and a dormant-season cutback does not cost next year’s bloom.
Quick Pruning & Maintenance Specs
| Pruning Tolerance | Moderate–High |
| Primary Pruning Window | Autumn–winter cutback (perennial zones) or season-end removal (annual zones) |
| Secondary Maintenance Window | Light shaping during active growth to keep it on its support |
| Typical Frequency | Ongoing light shaping; one harder cutback per year where perennial |
| Main Objective | Train onto its support and control size – “just for design” per its own care notes |
| Young Plant Priority | Guide leading twining stems onto the trellis; pinch once to encourage low branching |
| Mature Plant Priority | Annual renewal cutback (perennial zones) and ongoing shaping to keep it within its space |
| Best Tool Type | Precision snips or bypass secateurs |
| Avoid Heavy Pruning During | Peak summer flowering, unless size control makes it necessary |
Pruning by Plant Age & Size
Newly Established
Guide the young twining stems onto their support as soon as they are long enough to reach it, and pinch the tip once to encourage branching low down rather than one bare runner.
Young / Formative
Training is by guiding (twining vines wrap themselves rather than needing tying) onto a trellis or support; light, soft ties can help at the very start until the stems take hold.
Mature / Established
In perennial zones, an autumn–winter cutback removes tangled, leggy or cold-damaged growth and resets the framework for spring; through the growing season, ongoing light trimming keeps it “for design” – in bounds on its support – without any real structural pruning.
Seasonal Pruning Schedule
Dormant/Winter (zone 9+ perennial plants): cut back frost-nipped, bare or tangled stems. Fresh twining growth breaks from the base in spring with no loss to the coming season’s bloom, since flowers form on new growth.
Summer Canopy Management: light trimming of stray shoots off the trellis keeps the vine in its space; because flowering is continuous on new growth, this does not meaningfully reduce the current display.
Flowering & Fruiting Wood
Flowers form on current-season growth throughout spring, summer and autumn, not on old wood, so an autumn–winter cutback in perennial zones does not sacrifice next year’s bloom – the plant simply produces fresh flowering shoots from its base or remaining framework in spring. Trimming during the season only delays flowering briefly on the cut stems while new shoots regrow and rebloom.
Structural Pruning & Training
Manage which leading stems are trained onto the support and remove any that have grown away from the trellis and become tangled with themselves or nearby plants. Height and spread are controlled by simply trimming back stems that outgrow their allotted space, given this vine’s fast growth rate.
Special Growth to Remove
The individual flowers are small and axillary, so deadheading is neither practical nor necessary. In perennial zones, remove winter-damaged or bare, leggy stems in spring before new growth resumes.
Container & Small-Space Pruning
In a pot on a small trellis or obelisk, more frequent pinching keeps growth in scale with a restricted root run, and a leggy, overwintered indoor specimen is best cut back hard before it goes back outside onto its support for the season.
Tools
Precision snips for soft new growth and light shaping; bypass secateurs for the thicker, semi-woody base of an established perennial specimen; soft ties for guiding young stems onto the trellis until they take hold.
Tool Hygiene & Disease Risk
Routine. No significant tool-borne disease; its recorded pest, mites, is not spread by pruning cuts, so standard clean, sharp tools are sufficient.
Cut Placement & Technique
Cut just above a leaf node or pair; new twining shoots break from that point. Cut trailing stems back to a point still attached to the support rather than leaving loose, dangling lengths.
Heavy Pruning & Rejuvenation
Tolerated well: a leggy perennial specimen, or one brought back from overwintering indoors, can be cut back hard to near its base in early spring. Given this vine’s fast growth rate, it reshoots and reflowers within the same season.
Post-Pruning Care
Water consistently to support the regrowth flush and watch for its recorded mite pressure on the tender new shoots that follow a cutback; no special feeding is needed.
Common Pruning Mistakes
- Letting the vine grow into an untrained, tangled mat instead of guiding leading stems onto the trellis as it grows.
- Hard-pruning purely for shape in the middle of a heavy summer flowering flush, needlessly sacrificing the current display.
- Not cutting back a leggy overwintered indoor plant before returning it to its outdoor support.
When NOT to Prune
Avoid a hard cutback purely for tidiness during peak summer bloom, and avoid pruning immediately after transplanting until the plant is established and growing away.
Recommended Tools (by task)
- precision_snips – light shaping and pinching soft new growth through the season.
- bypass_secateurs – the thicker, semi-woody base stems of an established perennial specimen.
- soft_ties_stakes – guiding young twining stems onto the trellis until established.
Propagation Guide
Black eyed Susan vine is easily raised from seed sown warm in spring, and just as easily increased from stem cuttings when a specific flower color needs to be kept exactly true; both methods are simple and the vine typically flowers the same season either way. Overall difficulty is easy.
Quick Propagation Specs
| Best Propagation Method | Seed |
| Alternative Methods | Stem cuttings (to preserve a specific flower color) |
| Propagation Difficulty | Easy |
| Seed True-to-Type | Variable – flower color can vary from seed, as mixed-color seed strains are common |
| Vegetative True-to-Type | Yes |
| Best Propagation Season | Spring through autumn, per the site’s recommended planting season |
| Seed Germination Time | Typically 1–3 weeks in warm conditions |
| Cutting Rooting Time | Typically a couple of weeks in warm, humid conditions |
| Germination Temperature | Warm, roughly 21–24°C (70–75°F) |
| Seed Sowing Depth | Shallow, just covered |
Growing from Seed
Sowing Season
Start indoors in late winter/early spring in cooler climates, or sow directly once the danger of frost has passed – matching the site’s spring-through-autumn planting window.
Sowing Depth & Orientation
Sow shallowly, just covering the seed.
Germination Conditions
Warm, roughly 21–24°C (70–75°F), with consistently moist (not waterlogged) medium.
Germination Time
Typically 1–3 weeks.
Seedling Care
Pot on once true leaves appear and provide support or a trellis early, as this vine is a fast, vigorous climber.
Stem Cuttings
Cutting Type
Softwood nodal tip cuttings.
Best Timing
During active growth in the warmer months.
Cutting Preparation
Take cuttings a few nodes long and remove the lower leaves.
Rooting Setup
Moist potting mix or water, kept warm and humid.
Rooting Hormone
Optional – not required, as this vine roots fairly easily.
Rooting Time
Typically a couple of weeks.
Bloom & Flower Guide
Quick Details
- Bloom Season: Spring, summer and autumn – almost continuous in the warm months
- Time to First Bloom: Fast – within a couple of months from seed
- Flower Appearance: Five rounded petals in orange, yellow, white or pink around a dark central eye
- Edibility: Grown as an ornamental, not as a food plant
Detailed Blooming Overview
Black-eyed Susan vine flowers long and freely, twining up supports and covering itself in cheerful five-petalled blooms. Most have the signature dark “eye” at the centre, though the surrounding colour ranges from orange and yellow to white and pink.
Flower Characteristics
- Flat, five-petalled flowers with a dark central eye.
- Colours include orange, red, white, pink and yellow.
Bloom Care & Thinning
- Keep it blooming: Regular deadheading and feeding keep the flowers coming; pinching the tips encourages bushier, more floriferous growth.
Bloom Health & Protection
- Spider mites and whiteflies: In hot, dry spells these sap-suckers can slow flowering – rinsing the foliage and, if needed, insecticidal soap or neem oil helps.
Pests, Diseases & Troubleshooting
Overview: Black-eyed Susan vine is a fast, free-flowering annual/tender climber that is easy and largely trouble-free; in warm dry conditions or under glass it attracts spider mites, whitefly, aphids, scale and mealybugs, and it dislikes cold, wet, badly drained soil. Warm, sunny, evenly moist but well-drained conditions keep it clean.
Quick Troubleshooting Overview
| Issue / Pest | Main Symptom | Primary Solution |
|---|---|---|
| Spider mites | Stippled, webbed leaves in heat | Hose, insecticidal soap/oil |
| Whiteflies | White cloud on disturbance | Sticky traps, soap/oil |
| Aphids | Sticky, curled new tips | Water jet, insecticidal soap |
| Scale / mealybug | Bumps or white fluff | Alcohol dabs, oil |
| Root rot | Wilting in wet soil | Improve drainage |
Common Pests & Management
- Spider Mites (Tetranychus urticae):
- Symptoms: Fine pale stippling or bronzing of leaves, with delicate silken webbing on undersides and between stems; worst in hot, dry, dusty conditions. Heavily fed leaves dry, curl and drop.
- Prevention & Control: Raise humidity and hose foliage regularly to break the dry microclimate mites favour. Remove and destroy the worst leaves, and conserve predatory mites and other natural enemies. Treat with insecticidal soap or horticultural/neem oil, thoroughly wetting leaf undersides and repeating every 5-7 days to catch new hatchlings.
- Whiteflies (Trialeurodes vaporariorum / Bemisia spp.):
- Symptoms: Tiny white moth-like insects that fly up in a cloud when foliage is disturbed; nymphs and adults suck sap from leaf undersides, causing yellowing, weakness and honeydew with sooty mould.
- Prevention & Control: Hang yellow sticky traps to monitor and reduce adults, and clear weeds that host them. Encourage parasitic wasps (Encarsia) and lacewings. Spray insecticidal soap or horticultural/neem oil to the leaf undersides, repeating to break the life cycle.
- Aphids (Aphidoidea):
- Symptoms: Clusters of tiny soft-bodied green, black or grey insects on new shoots, flower buds and leaf undersides. Feeding causes puckered, curled or yellowing young growth, and a sticky honeydew that fosters sooty mould and attracts ants.
- Prevention & Control: Knock colonies off with a firm jet of water and pinch out badly infested tips. Encourage ladybirds, lacewings and hoverflies, and avoid excess nitrogen that pushes soft sappy growth. For persistent outbreaks apply insecticidal soap or a light horticultural/neem oil, coating leaf undersides and spraying in the cool of evening to protect pollinators.
- Scale Insects (Coccoidea):
- Symptoms: Small immobile brown, tan or waxy white bumps clamped to stems, twigs and leaf undersides. They exude honeydew that blackens with sooty mould; heavy infestations cause yellowing, dieback and reduced vigour.
- Prevention & Control: Scrub off light infestations with a soft brush or a cotton bud dipped in dilute alcohol, and prune out badly encrusted twigs. Conserve predatory ladybirds and parasitic wasps. Smother the vulnerable crawler stage with horticultural oil, timing repeat sprays for when young scales are active.
- Mealybugs (Pseudococcidae):
- Symptoms: White cottony masses tucked in leaf axils, growing points and along veins; feeding weakens the plant and leaves sticky honeydew followed by sooty mould. Some species also attack roots.
- Prevention & Control: Dab visible colonies with a cotton bud dipped in dilute alcohol and isolate affected plants. Avoid over-feeding with nitrogen. Encourage predators such as the mealybug destroyer ladybird, and treat with insecticidal soap or horticultural/neem oil, repeating until clear.
Diseases & Fungal Issues
- Fungal Leaf Spot (Cercospora / Colletotrichum spp.):
- Symptoms: Brown, tan or black spots, often with a yellow halo or concentric rings, that enlarge and merge in warm humid weather; severe spotting causes leaves to yellow and fall.
- Treatment & Management: Remove and destroy spotted leaves and fallen litter to reduce spores, and avoid overhead watering. Improve spacing and airflow. Copper-based fungicides can protect new growth if the problem recurs each season.
- Powdery Mildew (Erysiphales):
- Symptoms: A white to greyish powdery coating on leaves and shoots, usually starting on the upper surface; affected leaves may yellow, distort and drop. Worst in crowded plantings with warm days, cool nights and poor airflow.
- Treatment & Management: Space and prune for good air movement and sun, and avoid wetting foliage late in the day. Remove affected leaves and clear fallen debris. Where needed, apply a sulphur or potassium-bicarbonate fungicide, or a horticultural oil, at first signs and repeat per label.
- Root & Crown Rot (Phytophthora / Pythium spp.):
- Symptoms: Wilting despite moist soil, yellowing lower leaves, and dark, soft, decayed roots or a rotted stem base; a slow decline or sudden collapse in heavy, wet ground follows.
- Treatment & Management: Prevention is decisive: plant in free-draining soil (or raised beds), never let the crown sit wet, and water only when the topsoil dries. Remove and destroy badly affected plants and improve drainage before replanting; biological drenches (Trichoderma) can help protect healthy roots.
Growing Difficulties & Abiotic Problems
- Overwatering & Root Rot:
- Cause & Symptoms: Yellowing lower leaves, wilting despite wet soil, and a soft, foul-smelling root ball or stem base result from waterlogged, airless soil that suffocates and rots the roots.
- Correction Strategy: Let the soil dry appropriately between waterings, plant in free-draining media, and ensure pots have working drainage holes. Ease off water in cool or dormant periods and never leave the plant standing in a saucer of water.
- Nutrient Chlorosis:
- Cause & Symptoms: Yellowing leaves with green veins (interveinal chlorosis), often on new growth, signalling iron or manganese lock-out, commonly in alkaline, cold or waterlogged soils rather than a true shortage.
- Correction Strategy: Correct the underlying soil condition first: improve drainage, avoid overwatering, and acidify high-pH soil with organic matter or elemental sulphur. A foliar or soil application of chelated iron gives a quicker green-up while the soil is corrected.
- Frost & Cold Damage:
- Cause & Symptoms: Blackened, water-soaked, limp new growth and leaf tips after a cold snap; this tender or tropical plant is damaged or killed by frost and by prolonged cold.
- Correction Strategy: Site in a warm, sheltered spot, delay planting until the cold has passed, and protect with fleece or bring container plants under cover when frost threatens. Avoid feeding late so growth hardens off before cold weather.
What Helps – Products & Tools
These fast tropical vines are easy to keep clean: hose and oil-spray spider mites in dry heat, use yellow sticky traps and soap/oil for whitefly and aphids, and dab scale and mealybug with alcohol. Copper fungicide is only for recurring leaf spot; the main structural point is free-draining soil to avoid root rot.
