Pocket BotanistCheck these first
- Measure the hours of direct sunlight the plant receives daily.
- Check the fertilizer label to see if it is high in nitrogen.
- Look for tiny flower buds hiding under the large leaves.
Likely causes
Insufficient Sunlight
PossibleHow to tell: The plant looks leggy with long spaces between leaves and very dark green foliage. It is not receiving the 6 to 8 hours of direct sun required for bloom production.
What to do: Ensure the plant is in a location that receives full sun all day. If it is shaded by nearby trees or structures, you may need to move it or prune back the shade source.
Excess Nitrogen
PossibleHow to tell: The plant has massive, lush green leaves but absolutely no flower buds. This happens when the soil is too rich in nitrogen, encouraging foliage over fruit.
What to do: Stop using high nitrogen fertilizers immediately. Switch to a balanced fertilizer or one higher in phosphorus to encourage the plant to shift energy toward flowering.
Find out what's wrong with your winter squash
The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
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When to worry
If the plant has been growing for more than 8 weeks without any signs of buds, it may be too late in the season to get a harvest. It is normal for the first few flowers to be male and drop off without setting fruit.
Stopping it coming back
Choose a sunny spot with well draining soil before planting. Use a fertilizer formulated for vegetables that promotes blooms rather than just leaf growth.
Winter Squash: not flowering? Check yours with a photo
Every plant is a little different. Take a photo of your winter squash and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Do winter squash need bees to flower?
- The plant will produce flowers on its own, but it needs bees or other pollinators to move pollen between male and female flowers to set fruit. Without pollinators, the flowers will open but no squash will grow.
- How long does it take for squash to bloom?
- Most varieties begin to produce flowers about 6 to 8 weeks after planting. Be patient if your plant is still young.
More problems with Winter Squash
- Why is my winter squash plant drooping suddenly?
- What are these white spots on my winter squash leaves?
- Why are the leaves on my winter squash turning yellow?
- Why are there bugs on my winter squash?
- Why are my winter squash leaves curling?
- Why are my winter squash leaves getting brown tips?
- Why are my winter squash leaves falling off?
- How do I fix root rot in my winter squash?
- Why is my winter squash plant growing so leggy?
Back to the Winter Squash guide
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.