Borage plant

Growing in Pots, Balconies & Indoors

Borage is a fast-growing annual herb with edible, cucumber-flavoured leaves and starry blue flowers loved by bees. The grower does not class it as a houseplant, but it grows readily in containers, and a compact plant can be raised on a sunny windowsill where it gets enough light.

Quick Details

• Container Size: 5-10 L (1.3-2.5 gal) per plant (grower’s guidance)
• Indoor Suitability: Not a deep-room houseplant, but a sunny windowsill can grow it – it needs strong, direct light
• Best Spot: Full sun to half shade; in very hot climates part shade keeps it from bolting
• Soil & Drainage: Well-aerated, organic-rich mix with sharp drainage – potting mix or peat with perlite or vermiculite (grower’s mix)
• Watering in Pots: Average – keep the soil moist with free drainage; water when the top dries and let excess drain right out

Indoors & On the Windowsill

• Not a houseplant: The grower marks it unsuitable as a room houseplant – it needs full sun that indoor corners lack.
• Sunny windowsill: On the brightest, sunniest sill a young or compact plant will grow and even flower; give it as much direct light as possible.
• Short-lived annual: It grows fast, flowers and sets seed within a season, so sow afresh rather than keeping it long-term.

On a Balcony or Patio

• A bee-friendly herb pot: A sunny balcony suits it well; the flowers draw pollinators and are edible in salads and drinks.
• Water & wind: Tall, soft growth can flop in wind – shelter it, and check moisture often as pots dry fast in sun.

Choosing the Pot, Soil & Long-Term Care

• Pot & drainage: A 5-10 L pot with strong drainage holes; the grower advises against a saucer or bottom tray so water drains freely out and roots never sit wet.
• Potting mix: Well-ventilated, organic-rich mix with good drainage – potting mix or peat with perlite or vermiculite (grower’s mix).
• Feeding: A light feed through growth is enough for this quick annual; pot nutrients leach, so little and often beats a heavy dose.
• Growing on: As an annual there is no repotting – sow into its final pot, or pot up seedlings once, then let it run its season.

Bloom & Edible Flower Guide

Quick Details

• Bloom Season: Spring and summer
• Time to First Bloom: The same season it is sown – often within about eight weeks
• Flower Appearance: Star-shaped, five-petalled flowers in blue, pink or blue-purple
• Edibility: Edible – the flowers are used in salads, cooked dishes and drinks

Detailed Blooming Overview

Borage is an easy annual that flowers generously from spring through summer, usually within a couple of months of sowing. Its nodding, star-shaped blooms open blue, pink or blue-purple and hum with bees all day. Both leaves and flowers are edible, with a mild cucumber flavour that has long made the blooms a favourite for garnishing food and drinks.

Flower Characteristics

• Star-shaped flowers with five pointed petals, in blue, pink or blue-purple
• Carried in nodding clusters and rich in nectar
• Strongly attractive to bees and other pollinators

Bloom Care & Thinning

• Using the flowers: pick them fresh for salads and cooked dishes, or freeze them into ice cubes for drinks
• Keeping it blooming: regular picking and light deadheading extend the flowering season
• Self-seeding: leave a few flowers to set seed and borage will happily return the next year
• Pollination: pollinated by bees, which the open flowers draw in numbers

Bloom Health & Protection

• Powdery mildew can film the leaves and stems in warm, dry, crowded conditions – better airflow and spacing help, and a sulfur-based or neem treatment can check it
• Black bean aphids sometimes cluster on flowering stems – a strong water spray or an insecticidal soap usually clears them