what is the diameter if they round pots or length x width if they square pots and how deep are the pots and what color are pots?

what is the dimensions of the planting area?

it would have been easier to read your post if you just listed the vegetable varieties in instead wasting space with pictures.

you need to have one question per line of text or you post will look like word salad.

once you provide the information above. I will try to answer the rest your post.

ttfn

Alright.

I have :

-3 kinds of bush beans and 2 peas, peppers, tomatilo, herbs, sunflower, zuckini,cucumber kale and i will have tomatoes.

Its in a black circular fabric container about a 20in diameter ×10in deep.

I have a large backyard with plenty of full sun and i'll arrange my pots in row.

So i'm wondering what plants would go well together as companion plants, i'd like to reserve a pot for peppers and one or two for tomatoes.

Also, how many veggies can I plant in a 15 gallon pot.

The book Square Foot Gardening might be helpful for you. Your library might have a copy. I have the original that you can find in used bookstores now. Published maybe 30 years ago. In it you would find info such as bean seeds can be planted 3 inches apart. One time I planted a square about 24" x 24" and got a nice amount of beans. But some years later when I had more space and sun, I did not like the results of planting a triple row of beans. I felt the middle row didn't get enough light.

You need to start pepper seeds indoors now or soon depending on where you live. I'm in NH and planning to start my pepper seeds "any day now". I have an indoor light rack for seed starting.

I think the sugar snap peas will need a teepee type of trellis. I can't see the variety. I use a fence trellis. You need to be able to get your hands inside to pick strays. I grow scarlet runner beans on a regular trellis against the house. Most blossoms and beans are on the south side. Since you are planning to arrange your pots in a row, I would try using a fence trellis that spans several pots and then plan seeds 2" apart on either side of the trellis. I have successfully grown pepper plants next to my sugar snap trellises but I'm growing in the ground.

I would plant three seeds each zucchini and maybe 4 or 5 cucumber in each pot but they are going to need a lot of water. You may have to think the zucchini to a single plant.

I don't like to mix my herbs up. You could plant maybe 4 -6 basil plants in a single tub. With room, they bush out more and get larger.

Thats a really interesting idea to have a trellis that spans a few pots