Getting it to bloom
Why won't my Green-Flowered Galtonia bloom? (and how to make it flower)
Also called Green-Flowered Galtonia, Green Summer Hyacinth (Galtonia viridiflora).
More about green-flowered galtonia
About Green-Flowered Galtonia
Galtonia viridiflora · also called Green-Flowered Galtonia, Green Summer Hyacinth · flowering
Galtonia viridiflora is a South African bulbous perennial closely related to G. candicans but distinguished by its soft, pale jade-green bell-shaped flowers borne in loose racemes on tall stems in late summer, making it a distinctive choice for white and green planting schemes. It requires full sun, fertile and reliably moist but well-drained soil, and is slightly less frost-hardy than G. candicans, performing best in milder gardens or with deep winter mulch protection. The most important care point is to lift bulbs in colder gardens (below RHS H3 zones) or provide a very generous mulch, as its lower cold tolerance compared to the white-flowered species means unprotected bulbs are easily lost in a hard winter. Like G. candicans, Galtonia is listed as non-toxic to pets by the ASPCA.
Plant type: flowering
Watch for — Failure to flower after dry spells: Unlike many summer bulbs, G. viridiflora is intolerant of drought during growth. A dry spell in early summer interrupts stem and flower development. Keep soil consistently moist with regular irrigation or a moisture-retaining mulch.
The reasons green-flowered galtonia isn't blooming
Almost every non-blooming green-flowered galtonia traces back to one of these, roughly in order of how common they are:
- Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.
- Too much nitrogen feed, driving lush foliage at the expense of flowers (very common with general or lawn feeds).
- The plant has not been deadheaded, so it stops flowering once it sets seed.
- Irregular watering — drought or waterlogging at the budding stage makes buds abort.
- It is still too young or was checked by a transplant and is rebuilding before flowering.
Feeding green-flowered galtonia a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.
The fix — how to get green-flowered galtonia to flower
- Maximise sun. Give green-flowered galtonia the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers.
- Switch the feed. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.
- Deadhead regularly. Remove spent flowers often to keep it producing more rather than stopping to set seed.
- Water consistently. Keep moisture even through budding and flowering — drought-then-flood swings make buds drop.
Light and feeding do most of the heavy lifting here. Dial in the spot with the light guide for green-flowered galtonia and get the feeding right with the green-flowered galtonia fertilising schedule — the wrong feed (too much nitrogen) is one of the most common silent reasons a healthy plant makes leaves instead of flowers.
Bloom season and what to expect
Green-Flowered Galtonia flowers across its growing season (mostly summer) and, kept fed and deadheaded, can bloom for many weeks or right up to frost.
Post-bloom care so it flowers again
Deadhead, keep feeding lightly, and many will rebloom; collect seed from the best plants at the end of the season if you want to grow them again.
For everything else this plant needs day to day, see the full green-flowered galtonia care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.
Green-Flowered Galtonia blooming — frequently asked questions
Why won't my green-flowered galtonia flower?
Green-Flowered Galtonia blooms on the season's growth given enough sun, warmth and the right feed — there is no cold or photoperiod trick, just good growing conditions and a bloom-leaning feed. The most common reason it is not happening: Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.
How do I make green-flowered galtonia bloom?
Give green-flowered galtonia the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.
When does green-flowered galtonia normally bloom?
Green-Flowered Galtonia flowers across its growing season (mostly summer) and, kept fed and deadheaded, can bloom for many weeks or right up to frost.
What should I do with green-flowered galtonia after it flowers?
Deadhead, keep feeding lightly, and many will rebloom; collect seed from the best plants at the end of the season if you want to grow them again.
What is the single biggest mistake stopping green-flowered galtonia flowering?
Feeding green-flowered galtonia a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.
Keep reading
- Green-Flowered Galtonia care — the full brief (light, water, humidity, problems, pet safety)
- Green-Flowered Galtonia light needs — usually the first thing to fix for flowers
- Green-Flowered Galtonia fertilising — the right feed for buds, not just leaves
- Should I water my plant? The simple check
- Why is my plant wilting? Wet vs dry
- Underwatered plant — signs and rehydration
- Why won't my peace lily bloom?
- Why won't my jade plant bloom?
- Why won't my tomato bloom?
- All 4114 bloom guides in the Growli library