Bit warmer today - 9 deg - so decided to try out the new soil blocker. Never used one before, but looked at advice on here and Youtube.
So, the soil mix I tried was 3 parts coco coir (bought some 9ltr blocks to try), 2 parts seed compost - which I sieved first - I was surprised how many solid big lumps were in there, thought seed compost was supposed to be fine ! 1 part vermiculite - probably should've bought smaller size, but it seemed ok - and one part soil (shop bought bag). Mixed it up into quite a wet mix, and seems to work ok. I have attached a pic to see. I plan to put them on top of a layer of wetted cardboard in a seed tray. When I want to use them for real, I will add a nutrient as well to the mix. Not sure what will happen after a few days, the plan is, as long as they are kept damp, they should hold together until the roots do that job.
I did pick them up and move them just to see if I could, and they didn't fall apart, so good result I think. Can anyone see any flaws in my plan at the moment? I'm tempted to try a few seeds in them, but may be a bit cold yet for anything to germinate. I have a heater mat coming soon, so maybe leek seeds in the blocks may work then in the greenhouse?