A tomato with a sunken brown patch at its base from blossom end rot

Plant Problems

Blossom End Rot

Sunken brown patches at the fruit base from uneven calcium uptake.

serious severityedible
Photo via Unsplash

What to look for

Sunken, brown-black patches at the base of the fruit, opposite the stem.

Why it happens

Uneven calcium uptake, almost always driven by inconsistent soil moisture rather than a calcium shortage in the soil itself.

Gentle remedy

Mulch to even out soil moisture and water on a consistent schedule.

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Commonly affected plants