Well I do think that sometimes it is not necessarily the fault of the compost.
Day heat, night cold, overall heat. Moisture levels and light levels all aid or mitigate germination, and it is never the same year on year.
It is a minefield really. An example of this is my spring onions. I always get a good crop from an early sowing, but this year despite following the same sowing routine I had poor germination. I decided it must be the compost, but was looking it up when I realised that the issue was the dry spring, so although I had watered the seed, because of the very dry weather, they had not been consistently moist snd so failed. This lack of moisture had not affected other seed sowings lime carrots, beetroot etc.
Taking dogs on holiday in summer


