Yellowing During Flowering...

I've read that yellowing during the end of flowering was normal but I'm only just into my 3rd week of flowering. There is a progressive yellowing of all leaves from the bottom to the top and it's getting the near middle now. I tried adding vegging nutes to my water the past couple of times but not the most watering and it only recently started to get worse. This is my second grow and my first one that is actually being successful.

My setup
-400W HPS
-like 16th day of 12/12
-nutes every other watering
-watering every 3-4 days
-always pH'd the runoff to 6.4-6.6pH
-fox farm nutes trio (tiger bloom and big bloom now during flowering)

looking down (you can see the yellow at the bottom)


bottom leaves which are pretty yellow


middle and upper leaves which are still pretty green

looks totally fine man , yellowing is normal even at this early stage , add some grow nutes for a week cut the bloom out or just continue what you doing and add abit of calmag or some epsom salts to the feed

why would I cut out the bloom and switch back to veg nutes while I'm in flowering?

veg nutes contain more nitrogen , your plants need nitrogen to keep green , during the first four weeks of flower your plants stretch and are still growing i never give my plants bloom nutes until week 4 of flower and at the end they still look beautiful

Cheese2011 said:

veg nutes contain more nitrogen , your plants need nitrogen to keep green , during the first four weeks of flower your plants stretch and are still growing i never give my plants bloom nutes until week 4 of flower and at the end they still look beautiful

Click to expand...

Oh alright. and thank you . So I'll just keep adding a bit of vegging nutes along with bloom nutes like I was doing before because that seemed to work pretty well.

Looks like classic nitrogen deficiency, would have expected your plants to show this later in flowering! You probably need more nitrogen in the fertilizer hence drop the bloom and up the grow a little or even better treat with a good source of nitrogen. Looks pretty progressive to me so try to slow it and eventually halt it before it takes all your fan leaves too soon. Like Cheese2011 said keep yor grow nutes going for a bit longer into flowering to avoid this. Plant still needs nitrogen in flowering just less than vegging and you starve the plant of nitrogen at the end of flowering because it is a highly mobile nutrient and easy for the plant to move from the stores in the fan leaves to where it needs it so you can let the plant supply its own nitrogen to finish growing rather than you have to add it.

Dealing with the same prob right now. Some yelloeing is good, but what I have isn't. I now know my plan of attack when lights come on. Thank you!