I've looked some more into it and noticed that 20/4 might just be Dinafem's general advice for autoflowering plants.So it's not strain specific.Not really too much of a difference
18/6 is fine.
I'd listen to advice here on RIU over breeders advice (not necessarily mine though )
The difference being in increased yield or speed of growth?20/4 is better for auto strains....but 18/6 will still do a fine job
Both.The difference being in increased yield or speed of growth?