What can I put in the soil to prevent fungus on tomatoes?
I like neem oil as a fungicide because it doubles as a pesticide and when you use it in the soil, it is taken up into the plants and helps to offer some protection from pests. This article will explain more about it:
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
My tomato plants are very healthy and have lots of flowers, but for some reason they are not fruiting. The flowers just drop off after a few days. I am located in Bakersfield, California.
It sounds like a pollination problem. These articles will help you:
https://www.gardeningknowhow.com/garden-how-to/beneficial/insect-pollination-process.htm
https://www.gardeningknowhow.com/garden-how-to/beneficial/creating-a-pollinator-garden.htm
I worked really hard preparing my garden box (about 6 feet by 4 feet) and have a mixture of mushroom compost, manure, and soil. Last year I grew delicious tomatoes! I just finished preparing my garden, when my husband went around to the back of the shed and brought a half opened bag of wet manure he left there from last year. Laughing, he tossed it into my garden and announces "fresh maggots!" I can't believe he did that! I desperately tried to get everything out - but i know some spread! HELP!!!
While it was gross that he did that, this should not cause problems for your vegetables. If you are concerned that they may be larva of a pest, you can treat the soil with neem oil. It is organic and safe for people, pets and beneficial bugs but will stop larva from maturing and they will die.
I have started tomatoes from seed in my house and while waiting for them to be transplanted outside, they are getting very tall and spindly with very narrow stems. Can I cut the main stem back by about one third or so to try to limit the height of the plant and thicken up the main stalk?
Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-fertilizer.htm
https://www.gardeningknowhow.com/edible/vegetables/tomato/should-you-prune-tomato-plants.htm
plant the plant up to the first or second set of leaves, the part below soil will turn into root system within a week of transplanting ,
Why do the leaves of my tomatoes and eggplants look like they have tiny white specks throughout? Is it a deficiency or bugs?
It may be psyllids. This article will help:
https://extension.colostate.edu/pubs/insect/05540.html
I have deer in my garden at nighttime. What can I do to keep them out of the garden? They eat almost anything in my garden. I can't stay out there at night to keep them out. Is there anything cheap I can use on my plants, as they like tomatoes and strawberry plants a lot?
It is difficult to keep them out. Nothing you use will work for long. But some things I have found that have worked for awhile were Irish Spring soap placed among the plants, spreading dog hair among the plants and motion sensor lights. This article will have some other suggestions: https://www.gardeningknowhow.com/plant-problems/pests/deer/deer-repellents.htm
I have heard that adding sugar to the soil when planting tomatoes will make them sweeter. Is there any truth to this?
Not exactly. Sugar can help the tomato plant grow roots a little better. The sugar (much like in people) acts like a quick energy boost to the plant and can help give a quick shot to help grow roots. More roots means a healthier plant and this means better tasting fruit.
But, just like people, too much sugar can hurt the plant, so use this trick sparingly.