That’s interesting Kathryn, I didn’t know about it being a common practice to use half-rotted manure as a growing medium, and I missed that detail in the blog. I was intending to go back over it with a fine-tooth comb to collect details, and I still will.
We keep hens - partly for their manure - but we bought a compost tumbler at the same time, and their manure spends six weeks in there being tumbled daily with kitchen scraps before being allowed in the general compost heaps. And yes, too much compost could definitely be bad for those eating the greens. But I’m still seriously impressed.
The malabar spinach that did well here in Worcestershire last year (or was it the year before? I can’t remember) loved the horribly hot greenhouse that everything else fried in. I overwintered it in the bedroom under lights, just ticking over, but then it got a lurgy and I threw it out. Family health problems this spring meant my seed-starting was rather chaotic, and those got missed, but I’m trying them again next year. New Zealand spinach, on the other hand, is doing wonderfully, both inside the tunnel and out, although I always forget how late it is to get going. Hope you have better luck with your MS - and the weather! - next summer.