You cant put warming trays right? I really think the soil mix might be to much overkill. I would try and repot if possible. I would love to have your greenhouse
We use warming mats and lights for the starts, but once they are transplanted they are just in a cedar raised bed. I think maybe I didn't mention that the soil isn't straight composted manure and straw, it was mixed with lots of dirt also and composted like that for like 9 months to a year before usage.
Also, what kind of straw? Certain types would be a big no-no due to PH. I'd up the temp and humidity and cut back on so much compost.
You may be right about the temperature.
It may be the issue because we had warmer temps last night and today and DH says the plants have perked up and grown a little.
I really am not sure what kind of straw.
We got this from our neighbors. I assume it is what they feed the llamas. We usually use horse manure instead because we have horses in the back field, and that seemed to work better with tomatoes. May have to go back to this, but won't know until we test the soil. We are also going to get some worm beds and some tumblers going soon to help with this. The weird thing is that everything else is growing right along, the oninons, radishes, garlic, cauliflower, cukes, cantilope and especially kale. The one other plant that isn't really growing that well is the peppers and they seem to be another one that likes the warmer temps. I think all might be well, if we could just get the supplementing heat source hooked up. (not this month) We are still going to test the soil anyway. Fortunately, once we move things to the aquaponics beds, soil is only used in the starting process. We will still use the dirt beds for root crops though, so I need to get this right.
I will try to post some pics later so you can see what you think by sight.
Thanks