Getting it to bloom
Why won't my Tomato bloom? (and how to make it flower)
Also called garden tomato (Solanum lycopersicum).
About Tomato
Solanum lycopersicum · also called garden tomato · edible
Tomato is a warm-season fruiting crop from the Andes, the cornerstone of the home vegetable garden. It needs 6-8 hours of direct sun, consistent water, and steady feeding to set heavy fruit. Foliage and stems are mildly toxic to pets if eaten in quantity.
Solanum lycopersicum is an edible crop in the nightshade family (Solanaceae); its wild red-fruited ancestor Solanum pimpinellifolium originates in the Andean region of western South America (Peru and Ecuador), with domestication tied to agricultural societies from Peru to pre-Columbian Mexico.
Plant type: edible
Sources: hort.extension.wisc.edu, inspection.canada.ca, britannica.com
The reasons tomato isn't blooming
Almost every non-blooming tomato 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).
- Heat or cold stress at flowering, or poor pollination, so flowers form but drop without setting.
- 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 tomato 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 tomato to flower
- Maximise sun. Give tomato 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.
- Help it set. Keep moisture steady, avoid temperature extremes at flowering, and encourage pollinators (or hand-pollinate) so flowers turn into fruit.
- 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 tomato and get the feeding right with the tomato 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
Tomato flowers through its warm growing season and, with good pollination, follows each flush of flowers with the crop — expect a steady run rather than one burst.
Post-bloom care so it flowers again
Keep feeding and watering steadily so flowering and fruiting continue; remove tired or diseased growth to keep energy going into new flowers.
For everything else this plant needs day to day, see the full tomato care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.
Tomato blooming — frequently asked questions
Why won't my tomato flower?
Tomato flowers (and then fruits) on the current season's growth — it needs full sun, warmth, steady moisture and a switch to a lower-nitrogen, higher-potassium feed once it starts to flower. 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 tomato bloom?
Give tomato 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 tomato normally bloom?
Tomato flowers through its warm growing season and, with good pollination, follows each flush of flowers with the crop — expect a steady run rather than one burst.
What should I do with tomato after it flowers?
Keep feeding and watering steadily so flowering and fruiting continue; remove tired or diseased growth to keep energy going into new flowers.
What is the single biggest mistake stopping tomato flowering?
Feeding tomato a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.
Keep reading
- Tomato care — the full brief (light, water, humidity, problems, pet safety)
- Tomato light needs — usually the first thing to fix for flowers
- Tomato 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 pepper bloom?
- All 85 bloom guides in the Growli library