Kalanchoe gastonis-bonnieri

Growing in Pots, Balconies & Indoors

This Kalanchoe is a sun-loving succulent (20-90 cm / 8-36 in) that the grower marks as not a true houseplant – it wants more direct sun than a typical room offers. As a succulent, though, it grows well in a container on a sunny balcony or patio, and a compact plant can be kept on a very bright, sunny windowsill.

Quick Details

• Container Size: Small to moderate – a free-draining pot to suit its succulent roots
• Indoor Suitability: Not a deep-indoor houseplant; only a very sunny windowsill will do
• Best Spot: Full sun to half shade
• Soil & Drainage: Very free-draining cactus/succulent mix
• Watering in Pots: Low to average – let it dry between waterings; overwatering rots it

Indoors & On the Windowsill

• Not a room houseplant: The grower marks it as unsuitable for general indoor life – away from strong light it grows weak and drawn.
• Sunny windowsill: As a succulent it can be kept on the brightest, sunniest sill with direct sun; turn it regularly and keep it off cold glass in winter.
• Overwintering: Not frost-hardy – in cold climates keep it indoors on a sunny sill or under glass over winter.

On a Balcony or Patio

• Light & shelter: Give it a sunny spot; it enjoys reflected heat from walls but pots dry fast, so check moisture. Protect it from heavy rain, which its succulent leaves resent.

Choosing the Pot, Soil & Long-Term Care

• Pot & drainage: A pot with strong drainage holes; skip a standing water saucer to avoid root rot. Terracotta breathes and dries fast, which suits succulents.
• Potting mix: A cactus/succulent mix, or potting mix sharpened with perlite or grit.
• Feeding: Feed only lightly in the growing season; it needs little.
• Repotting: Refresh the mix and pot up every couple of years as needed.

Bloom & Flower Guide

Quick Details

• Bloom Season: Winter
• Flower Appearance: Small pink, red or white tubular flowers hanging in clusters on a tall stalk
• Edibility: Toxic – Kalanchoe contains cardiac glycosides; not edible and harmful to pets if eaten

Detailed Blooming Overview

Kalanchoe gastonis-bonnieri (Donkey Ears) flowers in winter, sending up a tall stalk topped with clusters of small, pendulous, tubular flowers in pink, red or white. It is a striking cool-season bloom, but every part of the plant – flowers included – contains bufadienolide cardiac glycosides that are toxic to cats, dogs and livestock.

Flower Characteristics

• Small, tubular, pendulous flowers
• Pink, red or white
• In clusters on an upright stalk

Bloom Care & Thinning

• Managing the bloom: After flowering, cut back the spent stalk; the rosette often produces plantlets along its leaf edges.
• Safety: Keep the plant, its flowers and any dropped plantlets away from pets and grazing animals.