Pocket Botanist
Check these first
- Check the bottom of the pot for standing water.
- Feel the soil to see if it is soggy or waterlogged.
- Inspect the bulb for soft or mushy spots.
Likely causes
Overwatering
Most likelyHow to tell: The foliage turns yellow and wilts even when the soil feels damp. If you pull the bulb up, it will feel soft or smell foul.
What to do: Stop watering immediately and let the soil dry out completely. If the bulb is severely mushy, it is best to discard it to prevent the spread of fungus to healthy bulbs.
Poor Drainage
PossibleHow to tell: Water sits on the surface of the soil for a long time after watering. The pot may lack holes or the soil mix is too dense and heavy.
What to do: Repot the bulbs into a container with drainage holes using a well draining potting mix. Add perlite or grit to the soil to improve aeration.
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.
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When to worry
If the bulb is soft and smells like decay, it is likely too late to save that specific bulb. Focus on keeping the remaining healthy bulbs dry.
Stopping it coming back
Always use pots with drainage holes and allow the top inch of soil to dry out between waterings during the active growing season.
Grape Hyacinth: root rot? 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.
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Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Can I save a bulb that has started to rot?
- If only a tiny spot is soft, you can try to cut it away and let the bulb dry in a cool, airy place before replanting. However, it is often safer to discard it.
- How often should I water to avoid this?
- Water every 7 to 14 days, but always check the soil moisture with your finger first. If it feels wet, wait a few more days.
More problems with Grape Hyacinth
- Why is my grape hyacinth not flowering?
- Why are there pests on my grape hyacinth?
- Why are my grape hyacinth leaves turning yellow?
- Why is my grape hyacinth looking leggy?
- Why are the tips of my grape hyacinth leaves turning brown?
- Why is my Grape Hyacinth drooping?
- Why does my Grape Hyacinth have spots on its leaves?
Back to the Grape Hyacinth 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.