Nearly every tip has rooted on 4 ft+ canes. First year crowns planted last year. 1.) Prune them to 24"? 2.) relocate the new crowns from tip ones back into row? 3.) For the tips that didn't root...after pruning, should/could I plant those too? 4.) Can I plant early peas next to vines for compatibility, bee attraction and nitrogen fixing? 5.) I've read they are self-pollinating... do bees pollinate too?
These articles will provide advice on pruning erect blackberries:
http://ohioline.osu.edu/factsheet/hyg-1431
I'd say it's best to relocate the new crowns that have grown back into the row. This will allow you to have a neater planting that will be easier to pick from in the future.
Using the pruned tips as cuttings to plant should work too. You could also try "tip layering":
http://homeguides.sfgate.com/propagate-thornless-blackberries-35117.html
Peas are known as good companions for blackberries, so go for it! It is a good idea to use peas (or other nearby plants) to attract bees. Blackberries will be somewhat self-pollinated (by the wind), but bees also pollinate them and will help your plants produce more and better fruit:
https://www.ars.usda.gov/pacific-west-area/logan-ut/pollinating-insect-biology-management-systematics-research/docs/raspberries/
What is the difference between suckers and primocanes on blackberries?
The Blackberries produce canes in the spring called primocanes.
Suckers refer to the growth that comes up from the ground runners.
Here are some links that may help you identify the parts of the plant more easily,
https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberry-pruning.htm
https://hortnews.extension.iastate.edu/2011/3-9/blackberries.html
https://extension.umd.edu/growit/fruit-profiles/raspberries-and-blackberries
https://content.ces.ncsu.edu/pruning-and-training-thornless-blackberries
Here is a site that will help you iron out the differences between primocanes (fall fruiting, tall, no lateral branching), floricanes (summer fruiting, tall, lateral branching), and suckers (non-fruiting, short spindly canes): https://www.wikihow.com/Prune-Raspberries.
Also here:
https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberry-pruning.htm
We are trying to grow blackberries in pots. Blackberries grown in the wild attract chiggers. Will the blackberry plants we have in pots on our patio and deck also attract chiggers? We live in Texas which does have a chigger problem. If chiggers naturally gravitate to blackberries, how can we protect our plants from them?
I found no reports of potted commercial Blackberry plants attracting chiggers.
Here is a link with container care information.
https://www.gardeningknowhow.com/edible/fruits/blackberries/container-grown-blackberries.htm
Can I plant a blackberry fruit and have it grow?
Here are some links that will help you.
https://www.gardeningknowhow.com/edible/fruits/blackberries/growing-blackberry-bushes.htm
https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberry-pruning.htm
https://www.gardeningknowhow.com/edible/fruits/blackberries/propagating-blackberries-cuttings.htm
How do I make them last thru the winter? Is there anything I have to do besides pruning them back to make them come back in the spring?
It really depends on the variety and how cold your winters get. Most varieties of blackberry are hardy in USDA zones 5-10, which covers a lot of gardens. If your zone is colder, or if your particular blackberries are less hardy, then it's a good idea to give them some extra protection.
If your blackberries are the trailing kind that have to be held up with stakes, remove the stakes, lay the canes along the ground, and cover them thickly with mulch. If the canes stay upright on their own, just mulch around the bottoms. You can protect the upright canes further by putting up a windbreak.
You can read more about winterizing blackberry bushes in this article: https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberry-bushes-in-winter.htm
In the spring after all chance of frost should you remove the died leave from around the base of the plants?
Yes, these leaves aren't helping the plants and can shelter insects and disease spores. Think of it as part of the usual clean up activities undertaken for good garden hygiene.
I found a lot o this plants by the house and I would like to know is those are edibles berries
Yes, the look like wild blackberries. The fruit, foliage and canes all look right.