Choice of medium - coco
I wanted to modify it slightly because from past experiments I knew that rockwool soaks more water than needed (this is mainly problem when plants are young). I wanted to select another medium while still have the easiness of planting to cubes (no plastic pots). Then I’ve found that Jiffy is making these great coco blocks. These are sold compressed so you don’t have to bring any large bags into your house ;). Box of 92 of these is sold for about 30 GBP. Jiffy also makes peat version, but I wanted to go with coco as it offers superb air-water ratio properties.
After soaking compressed block it expands so each Jiffy Coco Block is 10x10x8,5cm. It is still very shapeable (outer mesh is almost brittle so take care) so I managed to form them to fit five of them into tray ~48 cm wide.
