How do you get the soil the correct moisture when first starting?
I've tried the terrarium a couple time with seedlings. They sprouted, they died. I can generally keep violets alive so when I saw this mini-violet, oddly with two completely different types of flowers in one plant, and with my terrarium set up empty and waiting at home, I went for it. I also got a mini fern, solely because it was the only other mini in the store that complicated the violet (aesthetically at least). I am notorious for killing ferns and have committed about 2 decades of genocide against ivies--I added the last living sprig of my latest ivy victim to the terrarium, not expecting it to live, but just because it IS alive for the moment and I have nothing else to do with it.
So, my few Qs:
1. Do these plants sound like a good mix?
2. I really don't know how to determine how much to water the soil right out of the gate... Any pointers? Rule of thumb?
3. If the moisture level is uncertain, should I close the lid immediately? Or wait... how long?
4. Any simple tips to keep a fern alive? I don't expect much from the ivy twig but I'd like to keep this fern alive (it would be my first survivor fern).