Forums DIY Gardeners – compost question Reply To: Gardeners – compost question May 9, 2018 at 10:31 am #233 Ashley 3 Posts Well rotted manure is ideal to lighten up heavy clay soil, anything mixed in or even left on top to be taken down by worms will help, wild flowers are not as easy to grow as you might think they should be, they can be very fussy where they grow, more expensive but more reliable would be a selection of mixed bulbs, I planted a couple of cheap bags last spring from Aldi and they have established well already whereas seeds tend to be more delicate, a mix of the two may work.