Does this plant need fertilizer to bloom?

No, it actually performs best in poor, rocky soil. Fertilizer often does more harm than good by encouraging weak growth instead of flowers.

When should I expect flowers?

You will typically see the bright yellow blooms from late spring through mid-summer. The timing depends on your local elevation and climate.

Sulphur-flower buckwheat: not flowering, causes and fixes

Check these first

Measure the hours of direct sunlight the plant receives.
Check if the plant is being shaded by nearby shrubs.
Confirm you have not applied any fertilizer recently.

Likely causes

Insufficient sunlight
Most likely
How to tell: The plant looks stretched out and lacks the dense, compact growth typical of this species. It fails to produce flower buds even in peak season.
What to do: Move the plant to a location that receives full, direct sun for at least 6 to 8 hours a day. Avoid planting near trees or structures that cast heavy shade.
Excessive fertilizer
Possible
How to tell: The plant produces lush, dark green foliage but no flowers. This happens when the soil is too rich in nitrogen.
What to do: Stop all fertilization immediately. This plant prefers lean, rocky soil and does not need any added nutrients to bloom.

Other plants that won't flower

Find out what's wrong with your sulphur-flower buckwheat

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.

When to worry

It is normal for young plants to skip flowering during their first year as they focus on root development. Be concerned only if a mature plant fails to bloom for two consecutive seasons.

Stopping it coming back

Plant in a sunny, open spot and leave the soil lean. Do not amend the soil with compost or fertilizer.

Sulphur-flower buckwheat: not flowering? Check yours with a photo

Every plant is a little different. Take a photo of your sulphur-flower buckwheat 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.

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Questions people ask

Does this plant need fertilizer to bloom?: No, it actually performs best in poor, rocky soil. Fertilizer often does more harm than good by encouraging weak growth instead of flowers.
When should I expect flowers?: You will typically see the bright yellow blooms from late spring through mid-summer. The timing depends on your local elevation and climate.

Why is my Sulphur-flower buckwheat not flowering?