Plant looks dead but many tomatoes still on the plant, planted in a large pot on te porch
Unfortunately, there are quite a few causes for this. With limited information and without seeing the damage, I can only guess.
Bacterial/viral infections can cause this, and is most common with overwatering. Tomatoes need to dry out some between watering. At least 2 or 3 inches below the soil should be completely dry before watering again.
Many nutrient deficiencies can cause leaf drop, as well. It could be that the the plant has used up all of the nutrients available.
Last, it could have received a shock of heat, or dried out completely before being watered. This can cause significant leaf drop.
These two articles will help:
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/edible/vegetables/tomato/growing-tomatoes-guide.htm
I have one tomato plant that has good size tomatoes but the under side is black where the top is fine.
This is Blossom End Rot and is from a lack of calcium.
This article will help you.
https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-blossom-rot.htm
I planted 20 hybrid tomato plants and all but one are blooming and producing fruit. The one plant not producing fruit is a Better Boy while the next two adjacent plants are Better Boy and producing with out issue. The plant that is not producing seems to have heavier stems, slightly smaller leaves and blooms, but does not set fruit. Plants are spaced 4 ft. apart in full sun in an area void of tomato plants last year. All plants are in cages and the Better Boy that is not producing is 39" tall while the other two are 52" tall. While I understand the possibility of a seed mix up, that does not explain the lack of fruit. The plant is in the middle of the row and not at the end of row near sod or other plants. Any idea as to the cause, and a solution. I will provide a picture of the 3 Better Boy plants and identify the one not producing and a close up of leaves and blossom. While this plant has numerous blossoms the other 2 appear to have more blossoms.
There can be a few reasons; such as excess nitrogen or lack of pollination.
These articles will help you.
https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-blossoms-no-tomatoes.htm
https://www.gardeningknowhow.com/edible/vegetables/tomato/pollinate-tomatoes.htm
I saw a you tube video from Funkie Gardens back in Minnesota,I live in the Central Valley in California and the person speaking in the video ,said that foliar spray from this product would really help my Empress Wu Hosta grow.Normally it only gets about a foot tall.In a fully growing season.Is this for real?
Foliar feeding can help if you do so carefully, and according to instructions. Many plant foods, also, have foliar feeding instructions listed on the back.
As for making them taller... This will, mostly, be a genetic constraint. Sometimes you can get a little bit more out of a plant, but the height will largely be set by genetics.
These articles will help:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/what-is-foliar-spray.htm
https://www.gardeningknowhow.com/ornamental/foliage/hosta/growing-hosta-plants.htm
The leaves are curling over and are very dry.
Curling leaves could be watering issues, excess heat, pests or diseases.
This may take a bit more inspection to determine the cause.
This article discusses this issue.
https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-leaves-curling.htm
why do some of my tomatoes split .
In short, this is caused by a dry period followed by a wet spell.
This article will help: https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-cracking.htm
see pictures Thanks for your help
This is not severe yet, but this is the start of a calcium, and magnesium deficiency. You can correct this with a simple application of dolomitic lime. This will provide both of these elements to the plant, as well as keep the soil pH stable.
https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-blossom-rot.htm