Q & A

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E. Vinje

I’d think that the change in light, heat or humidity is likely causing the legginess in your tomato plants. Tomatoes like pretty even temperatures, if it gets quite cold at night, 90 degree weather can stress out your plants. The soil/fertilizer you are using may also be the culprit if it contains high amounts of nitrogen. The miracle grow you are using likely contains high amounts of nitrogen, I’d refrain from using it on plants which you are trying to improve fruit or flower production. Consider adding a liquid fertilizer that is low in nitrogen and high in phosphorus to your weekly or bi-weekly watering regime.

Wind would not be the culprit of legginess. With proper support structures, wind can actually help build the resiliency of tomato plants by strengthen the stems. These winds may actually be helping your tomato plants.

The mold on your potting soil would not be of concern to me unless you noticing negative side effects on your plants. If anything, the mold indicated to me that your soil is “living” and a thriving ecosystem that’s encouraging healthy vegetative life. If you still would like to get rid of it, consider decreasing the humidity in your greenhouse. What kind of ventilation do you have in your greenhouse? Adding fans that will blow air below the plants can help decrease residual humidity near the soil surface. A top dressing of a copper sulfide based product would also help the problem. Bonide Garden Dust should fit your needs perfectly, find it here! https://www.planetnatural.com/product/garden-dust/

Good luck growing!