Greenhouse

Hello, im going to breed butterfly's in my greenhouse. ( l 2,80m high, 1,8 b 1,7
I now got all the windows in, and the widows on the sides i putted netting on.
Now, in shops you can't buy plant like lantanas yet but my machaon pupae are going to hatch very soon.

Can you give me some advice about:
- tips for breeding
- tips for plants

It would be nice to hear experiences with foto's of greenhouses to get a better idea

Thanks, but im looking for some personel experiences.
And i got another question, what is a cheap way to warm up your greenhouse at night?