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Fixing Yellow Leaves on Nasturtiums: Soil Tilth, Organic Amendments, and Spider Mite Check

Soil Quality Is Key

Yellow leaves usually indicate poor soil tilth. Amend with organic matter: compost, bonemeal, humus, peat moss, manure. Earthworms and consistent moisture improve tilth.

Immediate Action

Top-dress lightly with alfalfa meal or kelp; scratch in gently, water.
Fertilize with organic mixes and compost tea.
In fall, till in brown leaves/grass with organic matter for next spring.

Don't Acidify

Acid feeding is unlikely to help and may hurt.

Check for Spider Mites

Hot, dry weather brings spider mites. Tap leaves over white paper with a magnifier—tiny moving dots = mites. Humidity suppresses them.

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