My boyfriend, knowing i'd been wanting a bonsai, bought me a green mound juniper for valentine's day. However, he didn't look into it at all and bought me an outdoor bonsai and it's winter here (SE Pennsylvania) and we also live in an apartment so we don't have a yard. If I could have exchanged the poor thing I would, but he ordered it through the mail so that wasn't an option.
What we do have is a small porch area that is directly under our neighbors deck and it's almost in a little cove that juts into our apartment so it has 3 walls around it as well. Long story short, it has some shelter from the elements. After about 2-3 days inside when I first got the plant 2 weeks ago I set him up on the "shelf" thing on the grill so the lid of the grill gives him a bit of an extra shield from the wind etc. I have his pot sitting on the humidity tray that he came with. By the way, I kept him inside those few days because I was doing tons of research to see if it was too cold for him outside because it was in the 20s F that week during the day and we only keep our apt in the low 60s and it happened to go up into the low 50s a few days later so he got a bit of an adjustment (global warming at it's finest maybe, lol)
Anyway, I took him in to water him today (I use the submersion in a tub method that I keep reading about) and I noticed he's yellowing and it must have happened pretty quickly because I watered him about 5 days ago since its been raining off and on and he was fine then, or so I thought. Last time he even had new growth! The temperature has been in the low 40s during the day but 50s today and going down to high 20s or low 30s at night. Very windy the past few days and I'm thinking that could be it? He isn't getting direct sun but he does get sun most of the day.
I can't imagine that the 5 days between waterings would do it that quickly, especially when although it's been windy, it's been raining enough that he essentially got a watering in between. Maybe not because he is sheltered too much. But could 1 time of going too long between waterings do that much damage? It's not something I plan on letting happen ever again if I can help it, but I'm just curious about what's going on here so I can fix it.
Or is it too late for him? The yellow is only on 2 branches so far - 1 being the half the branch and it's needles and the other just the needles. Should I bring him inside at night and just put him back out again in the morning because it's getting too cold? I feel like that's too much up and down. Put him in a cardboard box? Does he need the humidity tray in the winter? Should I prune off that yellowing branch? I'm just lost on these specifics and I don't want to lose the tree, especially so quickly! Im going to bring him inside for today/tonight or until I get an answer since it's pretty damn windy right now. I have nothing big enough to put him in for now to protect him from it. Ugh.
Thanks in advance for your help. Sorry this is so long, but I wanted to give you enough details so you understand what I'm dealing with/what you're dealing with in giving me advice.