What do you add to your soil

I find home made compost from grass and weeds really improves the soil. The only trouble with mine is it often holds a lot of weed seeds. I just spread it on the top and am prepared to do a wee bit of hoeing.

In the greenhouse I usually fill each plant hole with bought compost and then comfrey through the year. I have quite a bit of home produced compost from a hot bin this year so I'll try some of that in the greenhouse and compare the two.