When to start FF Big Bloom?? + Rep

I'm 3 days into flowering and should I use this in my next watering? Also bottom leaves are turning yellow and was wondering if lack of nutes could be it. Thanks + Rep to anyone who can help

If you believe the directions on the bottle are at least fairly accurate then as it says you should begin to use Big Bloom when your plants have fully vegged.

Now that raises the question of is fully vegged as in if the plants were allowed to veg/mature at least until sexual pre-flowers show up in veg or if someone has some specific height they veg to for reasons of height and fully vegged to them is very different than the other option.

In my case I tend to veg until I see sexual pre-flowers and that is when I begin to use Big Bloom.

I would say in your case since you have begun to flower you should begin to use a fertilizer for flowering so with your next normal watering/feeding make the switch.

If you have yellow lower leaves depending on various things that could be 100% normal. Unless it begins to travel up the plant I would not worry about it. If the leaves look very funky get the best possible pictures you can and post them and ask what people think. Likely though it is normal, especially if you vegged to a taller height and do not have super-wattage working for you.

...add the bloom fertz at the start of 12/12

ya man add the BB, the yellowing leaves at the bottom could be a N deficiency so just go ahead and add that shit

kylen said:

ya man add the BB, the yellowing leaves at the bottom could be a N deficiency so just go ahead and add that shit

Click to expand...

If we can assume that he had been using a vegging fertilizer that was at least adequate and feeding in sufficient amounts we could assume it unlikely he has an N deficiency and it is likely a conditional response by the plant(s). If he used decent vegging fertilizers but underfed his plants resulting in an N deficiency using Big Bloom, or any flowering fertilizer, would be unlikely to supply the plant(s) what is needed. Vegging fertilizers have higher percentages of N than flowering fertilizers so if he has a deficiency after using a higher N fertilizer it will be difficult to catch back up by feeding a fertilizer with less N.

If he has an N deficiency, which I tend to believe at least somewhat unlikely, what would be best is since he if very early in flower and the plant(s) have not fully transitioned into flowering I would feed one more time with the vegging fertilizer, in a slightly stronger mix, and try to catch up on the N and then start with the next feeding with the Big Bloom.

The only other way a correct amount of/balance of N would eventually exist for the plant(s) is if the low N level remained the same and did not fall lower and as the plant(s) progressed in flower and required less N, in time the requirement would drop to meet the supply. But by then real damage would be done so no one would want to attempt to rectify a situation of that sort in that way.

Lacking pictures, good clear pictures and hopefully many of them, it is impossible to say but my gut feeling is N is not a problem.

While it would not be proof even a decent description of his setup would be enough to pretty much figure out the likelihood of it being conditional/situational or a deficiency. If say he has a 250-watt light and at best average reflection, and vegged to about 18 or 20 inches, well really just about anything over 10 or 12 inches, before going to flower, you can bet the lower portions of the plant(s) are light-starved. If he burns a 1000-watt light and had top reflective material it would be a half-safe bet to guess deficiency.

so i use big bloom starting the 3rd week of veg, 2 weeks before that its just plain water and grow big but when they start week 3 i put in 1 cap of big bloom for every 2caps of grow big for the rest of veg and its usually about 2 caps growbig per 5 gallons of water and i dont have much die off at all, a few of the smaller leafs at the bottom that should be pruned anyway might die but other than that they seem very happy with the recipe...