could someone give there opinions on this yellowing pls ?

It's completely natural. Fan leaves yellow and fall off mid flower. It's fairly common knowledge.

skunky33 said:

It's completely natural. Fan leaves yellow and fall off mid flower. It's fairly common knowledge.

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Nothing natural at all about it, cannabis forum BS. Plants should remain healthy and green with absolute minimal foliage lose all the way through to harvest. If you losing leaves mid way through flower you are also losing yield............

Bullshit huh? Ever grown outside? ever read a book? Ever use a nutrient regiment with little to no N in flowering obviously not. You can tell if the plant is doing it naturally because they pluck right off the stem. There's only about 10,000 pages on the web that refer to it and almost every book written about growing MJ.

If i was you then i would flush for a few days,but to be honest just think has the 12/12 stage been has autum.Plants will yellow around week 4/5 of flowering,even more so on seed grown plants for some reason.If you look at the pictures the yellowing is all the bottom leaves so dont worrie they will be fine.Take my word for it more damage will be caused by adding this and that to sort a problem out that happens in nature any how hope this helps tyke.........................................................................................

skunky33 said:

Bullshit huh? Ever grown outside? ever read a book? Ever use a nutrient regiment with little to no N in flowering obviously not. You can tell if the plant is doing it naturally because they pluck right off the stem. There's only about 10,000 pages on the web that refer to it and almost every book written about growing MJ.

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Farm over 3000 acres. Also grow bedding plants for retail in season. Plants die after they have finished their cycle, not mid way through life...........and for the most part only the so called cannabis specific nutes(flowering) lack the necessary N for healthy, normal growth. You should read some books not written by a stoners.........