You’ve built yourself a greenhouse but no cows could you produce manure? Then go get your manure bucket just at the local car dealer. Guaranteed warm and fresh, yummi.
By hand you can load them to your pickup and belt them.
Note: So far can not be dumped directly into the greenhouse; simply fill it into your manure fork (hold the bottom of the bucket over it) and then tip your manure fork. (If anyone knows the right trigger, just tell me!).

Price: € 130 (high quality manure)
Capacity: 200 l (so you do not have to run too often).

Notice also the water tank (2000l)
and the liquid fertilizer canister (200l)