Pocket BotanistCheck these first
- Check if the plant is receiving at least 6 hours of direct sun.
- Look for spent flower heads that need to be trimmed.
- Feel the soil to ensure it is not bone dry.
Likely causes
Insufficient light
Most likelyHow to tell: The plant looks stretched out and has very few or no buds.
What to do: Move your container to a spot that gets at least 6 hours of direct sun. If planted in the ground, ensure no taller plants are shading it.
Lack of deadheading
Most likelyHow to tell: The plant has finished its first flush of blooms and is now producing seeds.
What to do: Shear the plant back by about 2 to 3 inches. This encourages a fresh burst of growth and a new round of flowers within a week or two.
Excessive fertilizer
PossibleHow to tell: The plant is lush and green but shows no interest in budding.
What to do: Stop using high nitrogen fertilizers. Switch to a balanced, water soluble fertilizer once every 4 weeks to support bloom production.
Find out what's wrong with your sweet alyssum
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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
If the plant is healthy and green but just resting, it is normal. Worry if the plant looks weak or stunted despite good care.
Stopping it coming back
Shear your alyssum back by one third after the first heavy bloom cycle to keep it compact and blooming all season.
Sweet Alyssum: not flowering? Check yours with a photo
Every plant is a little different. Take a photo of your sweet alyssum 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
- Will my alyssum bloom again after I cut it back?
- Yes, it loves a good trim. Cutting it back encourages branching and more flowers.
- Does heat stop the flowering?
- Sweet alyssum prefers cooler weather. In extreme summer heat, it may slow down its blooming until temperatures drop.
More problems with Sweet Alyssum
Back to the Sweet Alyssum 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.