Yellowing leaves.

In the chart, it says to give Big Bloom from the very beginning and to give it more than Gro Big. Do you know why this is? seems strange.

Because they said so, lol.

I e-mailed them (Fox Farms) a couple of months ago asking if I needed to add micro's seperate from their formula. They said it (the 3-part system) has all the micro's you need, but they were almost too careful not to be specific.

So my thoughts are that it likely contains all of the micro's for throughout the grow. Would Kinda explain why using Big Bloom at half-dose is working so well for me, but since it's organic, perhaps it is just build-up if used too liberally. (like...at recommended dilution, lol)

I guess I could shoot 'em another e-mail asking more specific questions, tho.

Organic based ferts still have the potential for building up in the soil.
When in doubt, feed lightly and work up to where you see mild tip-burn, then flush and continue feeding at a dosage JUST lower than the burn point. Nute schedules are very general and some strains do NOT feed very much and will be damaged by the same solution that would leave a heavier feeding strain still hungry.

So Rusty I guess what you're trying to say is Big Bloom has all the micros and Gro Big is a vegetative supplement? That's what's confusing - they almost seem to be named in opposition to each other. That's ok though, as doing what the company says is probably best, even if you discover their dose rates are too hot, you just back off some.

I'm still waiting for an e-mail from Fox Farms regarding the subject. The Tiger Bloom says it contains the micro's and all, but it's the Big Bloom that od's my plants if not used at half-strength. Big difference in performance without it, tho.

I don't believe it even mentions micro's on the Grow Big bottle, which made me wonder if it was in the Big Bloom, too.

The reason I believed that the Big Bloom had the micros, was, it is given throughout the veg and the flower stages. The more I think about it, the more I realize that there may be the micro's in both, Grow Big, and the Tiger Blood. But I don't pretend to understand the chemistry. I do know how to make Fox Farms work for me, tho, lol.

At the bottom of the nute schedule, it says
"Use Big Bloom in conjunction with other FF nutrients to relieve plant stress, unlock unwanted salt bonds, and allow for complete nutriotional flow." So perhaps it's just a 'plant laxative'.

I just got the reply from Fox Farms.

I was told that Big Bloom doesn't have enough phosphorus in it to use as a stand alone fertilizer when your plant is flowering. Also, the Tiger Bloom and the Grow Big both have your necessary micro's.

You can use Big Bloom in combination with Tiger Bloom. (already knew that according to their schedule)

Big Bloom can be thought of as a catalyst. Big Bloom can be used the entire plants cycle, on new plants, and on plants that are not doing well.

Handy info, hope it helps. :jointsmile: