I have several potted tomato plants (I live in a 4th floor balcony apartment) that were planted 4 months ago that were beautiful and healthy and recently the leaves have begun yellowing. They then withered and the plants died. And now, several other plants that are quite young are beginning to wilt and die: watermelon plants, squash plants, thyme and cilantro. They almost seem to rot at the base or root. I haven't changed how I water or fertilize the plants and there doesn't seem to be any insect or larvae infestation. I've planted new seeds only to have them grow healthy for a few weeks and then wither. What would be causing this? What should I do differently?
They may not be draining well enough and the water in the soil is literally rotting the stems and roots away. This article will help you determine if it is root rot:
https://www.gardeningknowhow.com/plant-problems/disease/treating-root-rot-gardening-tips-for-housplants.htm
You may want to change your watering schedule so that you water when the top of the soil is dry. If you are having drainage issues, this might help offset them.
I have a hanging tomato plant that hangs upside down. I now have about 5 stink bugs living on the plant. It is producing beautiful fruit. How do I kid rid of them, please?
Try putting some coffee grounds in the soil as most pest hate the coffee grounds. I have used it for slugs and other pest and it works don't know about stink bugs but it would be worth a try, here's hoping it works for you
The leaves on my potted tomato plants are not green and vibrant like they used to be. This is my first garden, so I am learning as I go. The leaves are getting light green and blackish, and are drooping. Why?
It sounds like they may be overwatered. Make sure the plants have very good drainage and are not sitting in standing water. This article may help:
https://www.gardeningknowhow.com/plant-problems/environmental/under-watering.htm
I plant my garden (many veggies and herbs--tomatoes, squash, beans, etc. ) in large planters. My husband takes topsoil off every spring to add new potting soil to remaining bottom half soil. He mixes it all around and we add garden tone and our compost to it. Do we need to do this every season, or can we just take out any old roots and then add garden tone-compost to the old soil for maybe 2 years worth? It is very costly to add new soil to half of old soil. I have 40 planters in our garden. Not to mention it is hard work for my husband to take out half of the old then mix the new to it.
As long as the soil is healthy, this should be okay. You may also want to consider sterilizing the soil before replanting. This article will help with that: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/sterilizing-soil.htm
One of the lower branches of my patio tomato plant has turned yellow. Several other leaves within the plant are also yellow. I have many flowers and several very small tomatoes growing. Can I simply remove the yellowed areas or should I use a pesticide?
This article should help: https://www.gardeningknowhow.com/edible/vegetables/tomato/yellow-tomato-leaves.htm
I recently discovered that what caused bottom rot on my tomatoes was the lack of calcium in the soil. Since I'm growing my veggies and herbs in containers, I wondered if there are other veggies and herbs that also need calcium.
All plants need some calcium in the soil, but some are more sensitive to a lack of it than others. Summer squash, peppers, eggplant and tomatoes are the ones that are most known for getting blossom end rot from a lack of calcium.
I planted two tomato plants in a large container on my patio. I put a hole in the bottom of the pot, then some river rocks and then a 50/50 mix of potting soil and compost. My tomatoes were growing really well (plant is approx. 3' tall) and we even saw about 8-10 tomatoes growing. All of a sudden the leaves were turning yellow and within about a weeks time, the branches are turning brown, like the plant is dying. The fruit is still on the plant and looks unaffected, but something is wrong and I'd like to try and save the plants.
The causes in this article may also apply to your tomatoes: https://www.gardeningknowhow.com/edible/vegetables/tomato/yellow-tomato-leaves.htm