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JDelage
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Location: Seattle, WA

Cucumber seedling turning yellow

What's causing this? This cuc is turning yellow, but the other plants seem to be doing fine. The potting soil is not dry & I watered them 2 days ago.
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applestar
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Re: Cucumber seedling turning yellow

If they are sitting in water in the tray, don't do that. Any water left in the tray should be removed -- I use a turkey baster.

The cucumber seedlings are likely too big. If you can't plant them yet due to temperatures being too cold, you have started them too early. Unlike tomatoes, etc. cucumber should only be started about 2-3 weeks before planting max. By the time the leaves grow as wide as the containers, the branching roots are pushing against the side of the container. Cucurbit seedlings are sensitive root disturbance. They are also heavy feeders and need more fertilizer than others -- this compounds the problem when you start too soon.
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JDelage
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Posts: 22
Joined: Wed Mar 22, 2017 3:40 am
Location: Seattle, WA

Re: Cucumber seedling turning yellow

Thank you. I suspect you are right that they're growing too big for their pot. The roots are starting to come out of their pot. I might just up-pot them.

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