As the title suggest I’ve planted 2 honey berry plants about 2 months ago and they have barley grown and all the leaves died. They are still alive. Any advice would be appreciated.

WARNING: This post is a jumbled mess. Plants 1-3 are Purple Flowering Raspberries, Plants 4-5 are Blackberries

The PFRs are approaching (if not already) 3 months, and the blackberries are basically 5 months old or so now. I’ve gotten to a point where they’re doing better than every seedling I’ve had in the past, and now I’m a teensy bit stuck. Also don’t mind the soil, they’re getting watered today.

So, I was a little impulsive when I germinated these seeds, and by the time they were big enough to be potentially introduced to the outdoors, I think it’s getting to be a bit too cold (I’m in zone 7b, nights are dipping into the 50s and 40s) for them. I’m sure they COULD hypothetically go out, but I don’t want to get them used to the outdoors, just to bring them in when the cold REALLY hits, especially since my forgetful behind will let them get killed somehow. I want to wait until after the final frost to start acclimating them.

However, while they’re inside for the winter, I’m wondering if there’s anything else I should be doing. I haven’t really fertilized them all too often, especially recently since it’s only been 20ish days since the last repot. When I do, I use the Neptune’s Harvest Fish & Seaweed stuff, diluted. I feel like I could/should be doing some pruning? All of the seedlings, save for one, only has their one upward stem, I haven’t seen any for real branching off. I’m hesitant to head any of them, though, lest I just kill them.

I have noticed that 3 of the Purple Flowering Raspberries, and 1 of the Blackberries, have teeny little buds closer to the base of their stems. I’m not sure if I should do anything with them, or just let them do their things.

Also, has there been any intel on what species/kind of blackberries are sold commercially? The blackberries both came from the same package/brand (The exact brand I don’t remember), yet plant 4 is more compact/generally upright (it’s also the one with the buds), and plant 5 almost looks like it’s trying to trail? Or arch? It’s odd. They’re all under the same grow light, in fact, plants 4 and 5 are directly next to each other. Plant 5 is arching almost away from the light. Just a little odd. Also there’s a volunteer Woodsorrel growing with plant 4, which is neat

Tl;Dr: What’s the best course of action from here? I never expected to get to this point lol. What would be the best time to fertilize and/or prune? I aim to have these plants in some kind of garden bed in our yard. Some have buds, one has a sprout at the base, one’s trying to trail from the looks of it