Field guide

Northwoods Tomato Triage

A calm checklist for common midsummer tomato problems in the Northwoods. We’ll go symptom by symptom, like a call-center troubleshooting tree, but with dirt under our nails.

Companion film

Watch: Tomato Triage

A short, calming walk through the garden — same checklist, but spoken out loud so you can watch it on your porch at dusk. Captions on.

Watch on my film channel →

Before you start

Grab a notebook and a pencil. Write down what you see: which leaves, which stems, which fruit. Take a breath. We’ll go one thing at a time.

Symptom checklist

Yellowing lower leaves

If the bottom leaves are yellow and crisp, it’s often just age. If they’re yellow with green veins, it could be a nutrient issue. Check your soil pH—tomatoes like it slightly acidic, around 6.2 to 6.8.

A solitary tomato plant with green leaves and yellow flowers against a bare white wall.

Spots on leaves

Small brown spots with yellow halos? That’s early blight. Remove the affected leaves and make sure your plants have good air flow. A little pruning can help, but don’t overdo it—tomatoes need their leaves to make sugar.

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Blossom drop

If your flowers are falling off before they set fruit, it’s usually a temperature issue. Tomatoes don’t like it too hot or too cold. If nights are below 55°F or days are above 90°F, they’ll drop their blossoms. Be patient—it’s not you, it’s the weather.

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Cracking fruit

If your tomatoes are cracking, it’s usually because they’re getting uneven water. Try to keep the soil evenly moist. A layer of mulch can help keep the moisture consistent.

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When to call for backup

If you’ve tried everything and your plants are still struggling, don’t hesitate to reach out to your local extension office. They’re like the call-center agents of the gardening world—patient, knowledgeable, and there to help.

Neighbors teaching with their hands

Gardens and kitchens share the same lesson: small daily rhythms turn into something you can share. Angeline Thomas keeps a three-year sourdough starter on the same patient schedule — feed, watch for bubbles, wait. It’s the same heart as waiting on a tomato to turn:

And for pushing pencils-and-paint into tiny hands, Alison Wood folds watercolor into teaching the world around us: