Thanks very much for the information! I have placed it outside for the day and there don't seem to be new black spots. This is working but would a grow light work? As I like having it near me during the day. I would still mist it and water it quite oftenRainy weather is good for Chinese elm. If you have it in decent soil, get ready to see it growing a lot!
If you have a light with UV strong enough to keep the elm alive, you may get your eyes damaged if you keep staring at your tree.Thanks very much for the information! I have placed it outside for the day and there don't seem to be new black spots. This is working but would a grow light work? As I like having it near me during the day
It's possible to keep it indoors under a light, but you'd need a pretty stout light. If your windows face south and have good sun exposure, even glazed that would help, but you'd still need some powerful lighting to keep the tree healthy.Thanks very much for the information! I have placed it outside for the day and there don't seem to be new black spots. This is working but would a grow light work? As I like having it near me during the day
There are too many internet sellers claiming elm can be indoors. This is a new claim and was not the case a few years ago. There are few species that can be indoors.
Well, yeah, the lighting quality has gotten better, but what about the cost in set up and electricity consumption (not only direct electrical consumption, but heat dissipation, etc.) I don't know much about this stuff, since indoors is never really going to be a great place to grow bonsai, unless you're willing to dedicate a section of your house to it. Lighting is better, but air circulation and low relative humidity are also big hurdles...Actually with the innovations developed by the marijuana industry, light is not the limiting factor for growing trees indoors, anymore. Back in 1999 I would say you can't grow trees under lights, but today that is simply not true, technology has advanced beyond that road block.
There are horticultural limits that are tricky, for example, pines need a sharp day-night temperature change, which is difficult indoor in a home, even if you have bright enough lights. So there are reasons pines are hard to grow under lights, but lights are no long the limit.
An led is your best bet……..and just keep humidity between 40-60%You are doing a lot of seedlings though, what would it cost for ONE light bulb for one tree, or is that light not available?
Just to add, I have massive southern-facing windows but are triple glazed so not much uv is getting in, I have gotten a quite cheap grow light to supplement the light sourceHi guys i was wondering i am no longer getting black spots but my new leaves are growing and they are a brownish color kind of gone off avocado mush color does anybody know what is wrong? (It has been outside for the past 4 days so I don't know)View attachment 441899