And of course here in England as long as it is well rotted mulch, be it homemade compost,manure,mushroom waste, composted green waste it doesn’t need to be bought potting compost in bags etc, butifthats all you can get that’s fine just puts the cost up. It just needs to be well rotted so as not to encourage slug& snail habitation etc. Even for carrots & parsnips as it won’t be dug in which traditionally was advised not todo in the parsnip& carrot bed to avoid them forking.