bottom of tree seedlings turning tanish brown

Timothy Wood
8 days ago

What does it mean when the bottom of tree seedlings turn a tanish brown at soil level? I have 6 sugar maple seedlings I just started from seeds this last month. 4 of them are in clear plastic drinking cups.

You can see that the bottom of the stem is kind of a tanish brown. What causes that and can it be treated? If it can be treated how should I do that? Also will it just grow out of it? The plastic cups don’t have any drainage holes so water doesen’t get all over in the house. Please let me know thanks.

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