Variety troubleshooting summary
Leaves curling upward without mosaic or severe distortion often reflect heat, pruning, or moisture stress. Yellowing from the bottom with spots requires closer disease inspection. Cracking usually follows a rapid moisture change. Blossom-end rot reflects disrupted calcium movement during fruit development. Flower drop may follow heat, cold, drought, excess nitrogen, or high humidity. When symptoms do not fit a clear cultural problem, photograph the whole plant, both leaf surfaces, stem, fruit, and roots, then consult a local Extension diagnostic resource.
Complete pest and problem guide
Common tomato problems include early blight, Septoria leaf spot, bacterial spotting, wilt diseases, root-knot nematodes, hornworms, aphids, flea beetles, blossom drop, cracking, blossom-end rot, catfacing, and sunscald. Begin with diagnosis. Concentric target-like lesions on older leaves suggest early blight; many small tan or gray spots with dark margins may suggest Septoria; rapid water-soaked collapse in cool wet weather requires urgent late-blight attention. Reduce risk with rotation, clean transplants, mulch, base watering, airflow, tool sanitation, and removal of severely affected tissue. Blossom-end rot is usually a calcium-delivery disorder driven by root stress and uneven moisture, not proof that the soil simply lacks calcium.