Would Tortoise weeds/seed mix grow ok in only potting compost? Got lots of potting compost so don’t really want to be buying anything else. But will they root ok in it without being transferred to another type of compost? The potting compost is quite fine. I’ve got 3 small window propagators so I can continuously grow spacing the sowing out in each propagator. The weed/seed mix contains ~ Whilst the mix of seeds may vary it will typically include Dandelion, Smooth Hawks Beard, Nipplwort, Chicory, Smoth Sow Thistle, Great Plantain, Hoary Plantain, Ribwort Plantain, Common Mallow, Musk Mallow, Dwarf Mallow, Shepherds Purse, Hairy Bittercress, Wavy Bittercress, White/ Dutch Clover, Red Clover, Common Vetch, Sainfoin, Creeping Bell Flower, Field Bindweed and Hedge Mustard!