🍅 Tomato

Solanum lycopersicum
The reason 90% of us garden — and the source of 90% of our gardening anxiety.
Sun
Full sun, 8+ hours; anything less and you're growing foliage with aspirations
Days to harvest
60–85 days from transplant (check the tag — it matters)
Spacing
18–24 inches for staked/pruned; 3 feet for sprawling; rows 3–4 feet apart
Soil pH
6.0–6.8 (the sweet spot where calcium and friends are all available)

How to grow

First decision: determinate or indeterminate. Determinates grow to a set height, fruit all at once, and stop — great for canning, containers, and people with commitment issues. Indeterminates vine forever until frost kills them, fruiting continuously — great for fresh eating all summer, but they need serious staking and you'll be pruning suckers like it's a part-time job.

Plant transplants DEEP — bury the stem up to the top leaves. Tomatoes grow adventitious roots all along buried stems, so deep planting builds a massive root system. (This works for tomatoes and almost nothing else, so don't try it with peppers and then email us.) Space for airflow; crowded tomatoes are a fungal disease buffet.

Mulch heavily after soil warms, prune suckers on indeterminates for airflow (or don't — it's a style choice with tradeoffs), and support the plants before they need it, not after they've flopped over dramatically.

Water & feeding

Deep, consistent watering — 1–2 inches a week, at the base, in the morning. Inconsistent water causes blossom end rot (the plant can't move calcium to fruit tips when water fluctuates) and cracking. Drip irrigation is the gold standard. A handful of worm castings in each planting hole plus a mid-season side-dress feeds steadily without the nitrogen spike that grows a 10-foot plant with three tomatoes.

Common problems

  • Blossom end rot (black leathery bottom on fruit): calcium transport failure from inconsistent watering — mulch and water evenly; it's rarely an actual soil calcium deficiency.
  • Hornworms (Manduca sexta — giant green caterpillars): hand-pick (blacklight at night makes them glow); parasitic wasp cocoons mean leave that one alone, it's a nursery.
  • Early blight (concentric rings on lower leaves): mulch to prevent soil splash, prune lower leaves, rotate crops, water at base.
  • Cracking: sudden water after drought — keep moisture even, pick at breaker stage and ripen indoors if rains are coming.

Harvest

Pick at full color but firm — or at 'breaker' (first blush of color) and ripen indoors to beat pests and cracking. Never refrigerate fresh tomatoes; cold kills the volatile compounds that make them taste like tomatoes. Counter only, heathens.

Nerdy fact: Tomatoes are nightshades (Solanaceae), in the same family as potatoes, peppers, and — awkwardly — deadly nightshade and tobacco. Europeans thought they were poisonous for 200 years because their pewter plates leached lead when it reacted with tomato acid, and the aristocrats who ate off pewter kept dying. The peasants with wooden plates were fine. Class warfare, but make it botany.

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