Fruit bush help!

[FruitNewbie]

Hello all! I'm new to the growing veg and fruit business, and basically wanting to do some container growing (ground isn't great -terrible deep rooted vines and also renting so not wanting to leave them here)
I have a few questions about plants I have just bought.
4 raspberry canes (summer fruiting)
2 blueberry plants
Blackberry plant
And a morello cherry tree. (In 7.5l pot)

I've tried doing some research and some are saying 50l pots with three canes ( I'm thinking of buying another raspberry plant with 4 canes but for autumn fruiting and mix them so 2 summer 1 autumn in one pot, and the opposite in another)

Would this work?
Do the blueberries need to be in the same pot for pollination? Or just separate pots next to each other?
How big a pot will I need for my cherry?
Do I need a partnering plant for my blackberry?
Do I mix chicken pellets or blood fish and bone in the middle of the soil when planting or just at the top? Which is best?

I know this is a long post, so thank you in advanced for your help 😊😊

[cheops]

Just to answer the bit about blueberries and pollination. Each plant does not even have to be side by side. Bees forage very successfully.

[johnjohn]

I'm at work at the moment so can't answer all the questions in one go.
For starters though, the cherry pot size depends on the root stock, do you have any idea what it is?
The blackberry will be fine on its own but will need support as it grows-ususally trained laterally.
I would stick the summer raspberries in the same pot and put the autumn ones in their own pot too.
I would think a 50 litre pot would be a minimum for these- there are loads of people on here that grow in pots that will give better advice.

Will try to add more later.

[johnjohn]

Regarding the BFB and the chicken pellets, whatever medium you use to plant into will require a boost after a period of time. For example, shop bought multi purpose compost has nutrients in for say 4 to 6 weeks and you could then add some BFB etc.

Welcome to the Vine by the way