Start tomato seedlings indoors with the right timing, soil, light, warmth and watering so they grow sturdy instead of tall and weak.

Both overwatering and underwatering make tomato plants wilt — but the fixes are opposite. Here is how to diagnose the problem in 30 seconds and what to do next.

Yellow leaves do not always mean your tomato needs food. Soggy soil, too much nitrogen, thirsty roots, pests, and too little sun can look surprisingly similar. Use the leaf and soil clues here to identify the problem before reaching for fertilizer.

Tomato seedlings need gentle feeding at the right time. Here is when I begin fertilizing, how much I use and how I avoid burning young roots.

Wilting does not always mean a tomato plant needs water. If the soil is still wet, limp leaves, yellowing from the bottom up, mushy stems, and a funky smell point to overwatering, with practical steps to help the roots recover.

It is the most important thing on the plant tag and most gardeners never notice it. Here is what determinate and indeterminate actually means — and why it changes everything about how you grow.

Tomato seedlings can die from wet soil, damping off, weak light or heat. Here is how I identify the cause before it spreads.

Tiny black spots can spread across tomato leaves and fruit. Here is how I identify bacterial spot and protect the rest of my plants.

Too much nitrogen can leave tomato plants lush, curled, scorched, and short on fruit. Here’s how to recognize fertilizer burn, flush the soil, help damaged plants recover, and prevent the problem next season.