![]() As soon as the seeds germinate and grow a few inches, they must be thinned. The trays you plant seeds in may contain several seeds to give you a good chance of germination. If seeds are to be grown indoors, make sure to get plenty of sun. Make sure your tomato plants get plenty of direct sunlight at least eight to ten hours per day. How do I get thick stems on a tomato plant? The most common reason tomato plants develop spindly and tall stems is a lack of sunlight. You can do this once a week or so and your plants will thank you for it! This will encourage the plant to grow new shoots and become bushier. Just wait until the plant has grown a few inches and then cut off the top couple of inches of the plant. ![]() Pruning tomato plants is actually pretty easy. This will encourage them to grow thicker stems and bushier. One of the best things you can do for your tomato plants is to prune them regularly. If your tomato plants are looking a little sad and in need of a pick-me-up, there are a few things you can do to help them along. One day they’re growing like gangbusters and the next they seem to have stalled. Varietal characteristics, cold temperatures, or reduced lightĭamage most common on the first cluster of fruitsĬool temperatures below 50 degrees Fahrenheit, CatfacingĬoncentric and radial cracks on ripe fruit.As anyone who has ever grown tomatoes knows, they can be finicky plants. Low sunlight, plant crowding, excessive nitrogen, insufficient ripening time, high temperaturesĮspecially on large-fruited and plum-type varieties, late in the growing season Low potassium levels in fruits environmental stress Varietal characteristic often affects large-fruited varieties Typically on surfaces exposed to full sunlight due to defoliation Olive-green to black, oily-looking lesions wet rots develop under favorable conditionsĭark, leathery lesions on the fruit bottom. Soft rot circular, brown/black, shrunken lesions on ripening fruit. Yellow or white spots or blotches beneath fruit skinĭark, leathery lesions may be shrunken a “bull’s eye” pattern may be visible usually at the stem end Small raised brown spots larger than bacterial speck lesions Pecked, torn, or chewed fruits often one “strike” per fruit more noticeable during droughtĪnimals ( birds, squirrels, groundhogs, deer ) Poor pollination/aborted fruits with temperature extremesĬlimb onto mature plants to feed on fruitīore deeply into young, green fruit fruits ripen prematurely secondary rots often develop Gray or black caterpillars feed on young or mature plants at night Mid to late summer pest very large with red or black “horn” strip foliage off branches Small, shiny dark insects that jump when disturbed Wilting/stunting of plants next to a walnut tree ![]() Wilting of lower branches first plants recover at night discolored stem tissueĭark canker forms at the soil line followed by plant collapse Leaves brown and die lesions extend to stems Herbicide damage ( 2,4-D, glyphosate, dicamba, and others) Leaves become narrow, twisted, crinkled, curled, or finely divided Lower leaf curling upward during hot weatherĭamage on new growth. Small, soft, pink or green insects on young growth Primarily on transplants (leaf undersides) Older leaves first, then newer leaves: nitrogen Interveinal yellowing: potassium, iron, magnesium, or manganese. Tiny yellow spots (stippling) leaves may appear dirty on the undersides Lower leaves yellowing and stems wilting, internal stem tissue discoloredįusarium wilt is more common than Verticillium Tiny, dark brown circular spots that develop yellow rings (halos)ĭark, raised spots on upper surfaces caused by excessive moistureĪdvanced symptoms of various fungal and bacterial diseasesĭark brown blotches on leaf tips and margins that enlarge rapidly, producing a water-soaked appearanceīrown-black cankers on the lower stem, followed by plant wilting Small, round tan/gray spots with dark margins on lower leaves Small, brown lesions with yellow halos that rapidly enlarge “bull’s-eye” pattern within lesions. This text table includes the most common problems of tomatoes described above, as well as minor, occasional problems of lesser significance.
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