Kalanchoe blossfeldiana

Growing in Pots, Balconies & Indoors

Kalanchoe blossfeldiana (flaming Katy) is a compact succulent that makes an easy, good-looking houseplant or patio-pot plant. It stays small, stores its own water and asks mainly for light and sharp drainage. Indoors it needs your brightest window – in a room’s weaker light it stretches and softens.

Quick Details

• Container Size: A pot a size or two larger than the root ball, with strong drainage holes
• Indoor Suitability: A good little houseplant in a bright spot
• Best Spot: Bright, indirect light – it flowers best in good light, out of harsh midday sun
• Soil & Drainage: Free-draining cactus/gritty mix – drainage is everything
• Watering in Pots: Water only when the mix has dried out; pots must never stay soggy

Indoors & On the Windowsill

• As a houseplant: Yes – it grows happily indoors given enough light. Stand it at your brightest window (south or west facing) so growth stays tight and well coloured rather than pale and drawn.
• Windowsill growing: Its compact size suits a sunny sill; turn the pot now and then for even growth, and water only when the mix is dry.
• Overwintering: In cold climates a pot lets you bring it indoors to a bright, cool, frost-free spot over winter.
• Keep it safe: Kalanchoe is toxic if eaten – keep it out of reach of children and pets.

On a Balcony or Patio

• Light, heat & wind: Give it the brightest spot you have; walls and railings throw back a lot of heat and pots dry fast, so check the mix often in warm weather. Move tender succulents under cover before frost.
• Practicalities: Raise the pot on feet so water drains away freely and does not pool on the balcony floor.

Choosing the Pot, Soil & Long-Term Care

• Pot & drainage: Use a pot with strong drainage holes and skip a standing saucer of water – wet feet are the fastest way to rot a succulent. Terracotta breathes and dries quickly, which suits it well; glazed or plastic holds moisture longer, so water more sparingly.
• Potting mix: A free-draining cactus/succulent mix, or a standard mix opened up with plenty of perlite, pumice or coarse sand; a layer of gravel, lava rock or pebbles in the base helps water clear.
• Feeding: Potted plants use up their soil, so feed lightly once or twice through the growing season with a dilute cactus or balanced feed – far less than a leafy houseplant needs.
• Refreshing the mix: After a couple of years the mix stops draining freely – tip the plant out, trim any tired roots and repot into fresh gritty mix.

Bloom & Flower Guide

Quick Details

• Bloom Season: Autumn and winter — and, with forcing, potentially at any time of year
• Time to First Bloom: Blooms while young and small; nurseries time it to flower in the pot
• Flower Appearance: Dense clusters of small four-petalled flowers in orange, yellow, red, purple, white or pink
• Edibility: Not edible — Kalanchoe is toxic to pets and people, and the flowers are among the most toxic parts

Detailed Blooming Overview

Flaming Katy is the florist’s kalanchoe, grown for its long-lasting, jewel-bright flower heads that can hold colour for many weeks. It is a short-day plant: flowering is triggered by long nights, which is why it naturally blooms through autumn and winter. To bring a plant back into flower, give it about six weeks of long, uninterrupted dark nights (14 hours or more of darkness) with bright days in between, then let the buds develop.

Flower Characteristics

• Small, four-petalled flowers in orange, yellow, red, purple, white or pink (singles and doubles exist)
• Massed into dense, flat-topped clusters held above the foliage
• Exceptionally long-lasting once open

Bloom Care & Thinning

• Reblooming: Give roughly six weeks of long dark nights to set buds, then return it to a bright spot.
• Deadheading: Snip off spent flower clusters to tidy the plant and steer its energy back into growth.
• Safety: All parts are toxic if eaten and the flowers especially — keep it out of reach of cats, dogs and children.

Bloom Health & Protection

• Grey mould (Botrytis) on spent flowers: In cool, damp, still air the dense flower heads can rot and turn fuzzy-grey; removing faded blooms and improving airflow is the first line of defence, with a suitable fungicide only if it spreads.
• Powdery mildew: A white bloom on leaves and buds in humid, crowded conditions; more space and airflow help, and neem oil or a sulfur-based fungicide can be used if needed.