Getting it to bloom
Why won't my Cylindrical Rock Jasmine bloom? (and how to make it flower)
Also called Cylindrical Rock Jasmine, Cylindrical Androsace (Androsace cylindrica).
More about cylindrical rock jasmine
About Cylindrical Rock Jasmine
Androsace cylindrica · also called Cylindrical Rock Jasmine, Cylindrical Androsace · flowering
Cylindrical Rock Jasmine is a rare, specialist alpine perennial endemic to the Pyrenees, forming extraordinarily tight, elongated cylindrical rosettes that build into dense domed cushions. White flowers with a yellow eye appear in spring. One of the most challenging Androsace species in cultivation, it is grown almost exclusively by specialist alpine enthusiasts in an alpine house or tufa garden.
Plant type: flowering
Watch for — Failure on non-calcareous substrates: This strict endemic calcicole declines rapidly on acidic or lime-free growing media, showing yellowing, poor growth, and failure to flower. Alkaline, lime-rich limestone grit or genuine tufa is the non-negotiable substrate requirement.
The reasons cylindrical rock jasmine isn't blooming
Almost every non-blooming cylindrical rock jasmine 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 cylindrical rock jasmine 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 cylindrical rock jasmine to flower
- Maximise sun. Give cylindrical rock jasmine 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 cylindrical rock jasmine and get the feeding right with the cylindrical rock jasmine 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
Cylindrical Rock Jasmine 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 cylindrical rock jasmine care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.
Cylindrical Rock Jasmine blooming — frequently asked questions
Why won't my cylindrical rock jasmine flower?
Cylindrical Rock Jasmine 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 cylindrical rock jasmine bloom?
Give cylindrical rock jasmine 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 cylindrical rock jasmine normally bloom?
Cylindrical Rock Jasmine 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 cylindrical rock jasmine 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 cylindrical rock jasmine flowering?
Feeding cylindrical rock jasmine a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.
Keep reading
- Cylindrical Rock Jasmine care — the full brief (light, water, humidity, problems, pet safety)
- Cylindrical Rock Jasmine light needs — usually the first thing to fix for flowers
- Cylindrical Rock Jasmine 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 3229 bloom guides in the Growli library