Getting it to bloom
Why won't my Japanese Larch bloom? (and how to make it flower)
Also called Japanese Larch (Larix kaempferi).
More about japanese larch
About Japanese Larch
Larix kaempferi · also called Japanese Larch · flowering
Japanese larch (Larix kaempferi) is a deciduous conifer popular as bonsai for its soft blue-green needle tufts, reddish winter twigs and brilliant gold autumn colour before needle drop. It bears small cones and is wind-pollinated. Fast and vigorous, it loves full sun, generous water and a proper cold winter.
Plant type: flowering
The reasons japanese larch isn't blooming
Almost every non-blooming japanese larch 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 japanese larch 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 japanese larch to flower
- Maximise sun. Give japanese larch 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 japanese larch and get the feeding right with the japanese larch 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
Japanese Larch 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 japanese larch care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.
Japanese Larch blooming — frequently asked questions
Why won't my japanese larch flower?
Japanese Larch 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 japanese larch bloom?
Give japanese larch 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 japanese larch normally bloom?
Japanese Larch 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 japanese larch 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 japanese larch flowering?
Feeding japanese larch a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.
Keep reading
- Japanese Larch care — the full brief (light, water, humidity, problems, pet safety)
- Japanese Larch light needs — usually the first thing to fix for flowers
- Japanese Larch 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 2023 bloom guides in the Growli library