Will aphids kill my grape hyacinth?

They rarely kill the plant, but they can ruin the flowers and weaken the bulb for the next year. It is best to remove them as soon as you see them.

Can I use household soap to kill them?

Use a mild, non-detergent soap mixed with water, but be careful not to use harsh dish soaps that could damage the plant leaves.

Why are there pests on my grape hyacinth? Causes and fixes

Check these first

Inspect the flower stalks for small clusters of insects.
Look for sticky residue on the leaves or stems.
Check the undersides of the leaves for hiding pests.

Likely causes

Aphid Infestation
Most likely
How to tell: You see tiny green or black insects gathering on the flower spikes. They may leave behind a sticky substance called honeydew.
What to do: Gently wash the aphids off with a steady stream of water from a spray bottle. For larger infestations, use a mild insecticidal soap or neem oil spray.
High Nitrogen Fertilizer
Possible
How to tell: The plant has very lush, soft growth that seems to attract aphids. Excess nitrogen makes the plant tissue more appealing to sap sucking insects.
What to do: Switch to a balanced fertilizer and avoid overfeeding. Focus on keeping the plant healthy rather than pushing for rapid growth.

Pests on other plants

Find out what's wrong with your grape hyacinth

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

A few aphids are usually not a major threat, but you should act if you see them multiplying quickly or if the flower stalks start to look distorted.

Stopping it coming back

Keep the plant healthy and check it weekly during the spring. Avoid overfertilizing with nitrogen to keep the plant tissue less attractive to pests.

Grape Hyacinth: pests? Check yours with a photo

Every plant is a little different. Take a photo of your grape hyacinth 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.

Get the app · Or check it from a photo now, free

Questions people ask

Will aphids kill my grape hyacinth?: They rarely kill the plant, but they can ruin the flowers and weaken the bulb for the next year. It is best to remove them as soon as you see them.
Can I use household soap to kill them?: Use a mild, non-detergent soap mixed with water, but be careful not to use harsh dish soaps that could damage the plant leaves.

Guides to these causes

Aphids

Why are there pests on my grape hyacinth?

Check these first

Not sure what's wrong with your grape hyacinth?