Pocket BotanistCheck these first
- Feel the soil two inches deep to see if it is dry.
- Check your recent fertilizer application schedule.
- Inspect the leaves for signs of heat stress.
Likely causes
Inconsistent Watering
PossibleHow to tell: The soil feels bone dry to the touch and the leaves look slightly wilted during the hottest part of the day. The tips turn crispy and brown as the plant struggles to move water to the edges of the foliage.
What to do: Water your cucumbers every 1 to 2 days to keep the soil consistently moist. Apply water directly to the base of the plant to ensure the roots get a deep soak.
Fertilizer Burn
PossibleHow to tell: You recently applied a heavy dose of synthetic fertilizer and the tips of the leaves are turning brown or scorched. This happens when excess salts accumulate in the root zone.
What to do: Flush the soil with plenty of plain water to wash away excess salts. Avoid fertilizing for 2 to 3 weeks until the plant shows signs of new growth.
Find out what's wrong with your cucumber
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
Worry if the browning spreads rapidly toward the center of the leaves or if the entire plant begins to wilt. A few crispy tips on older leaves are normal as the plant ages.
Stopping it coming back
Maintain a steady watering schedule and use a layer of organic mulch to keep the soil moisture stable.
Keep your cucumber healthy from here
Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.
Questions people ask
- Should I trim off the brown tips?
- Yes, you can snip them off with clean scissors to keep the plant looking tidy. It will not hurt the plant.
- Can high heat cause brown tips?
- Yes, extreme heat can cause the plant to lose water faster than it can take it up. Provide some afternoon shade if temperatures stay above 90 degrees.
More problems with Cucumber
- Why are my cucumber leaves turning yellow?
- Why are there spots on my cucumber leaves?
- What is eating my cucumber plants?
- Why is my cucumber plant drooping?
- Why is my cucumber plant not flowering?
- Why is my cucumber plant growing so leggy?
- Why is my cucumber plant dropping its leaves?
- How do I fix root rot on my cucumber plant?
- Why are my cucumber leaves curling?
This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.