Running into problems after using fox farm sledgehammer flush

Hey guys not sure what the problem is but I am using the complete line of fox farm. I potted plants in ocean forest in 5 gal pots. I am currently in week 5 of flowering and everything was going smooth until I used the sledgehammer flush. A few days after flush i noticed fan leaves turning yellow and some leaves curled up a bit. Weird thing is seemed like it was on the leaves directly under the light. Im using a 1000watt hps in a 4x 7 closet. I ph water to 6.5 and keep temps around 78 when lights are on. I had light about 11 inches from canopy i since raised light to around 30 inches. Ill take pics when light goes off tomorrow.... Also a few plants on the edges of closet are fine and look great so im not sure whats going on. any suggestions i no its tough without pics.

added some pics any ideas??? again this happened after sledge hammer flush.

i would flush it and start with fresh soil. if ya can. without having to many problems and you want the ph lvl at 5-7 so i bet if you flush it, it would do alot better.

If you have followed the FF feeding schedule then things are normal for late flowering as it lacks the N to keep them green until they finish. I would keep feeding them as you have been doing, drop the Sledgehammer and save your money. Adding a tablesppoon of Fish Emulsion to the FF schedule the next few feedings is about the best thing you could do. They are nice looking plants and just need a bit of extra N along with the FF nutes to finish.....

Thanks ill give fish emulsion a try. Cant start with fresh soil these plants are mini bushes..... Only thing that threw me off is some of the leaves curled up I thought this was caused by to much fertilizer or a buildup of fertilizers...... So you think this has nothing to do with the sledgehammer flush just coincidence???

Ya, I doubt the SH had much to do with it. With just 3 or 4 left you still should finish fine, just may be a bit short on foilage.

I gave the ff lineup a try and noticed if you don't keep adding growbig to the mix then you will get yellowing. especially if your strain is a "leafy" one. I have a strain called Blueberry jam and have been having problems with it after switching to promix, kept getting BAD yellowing like 3-4 weeks into flowering and couldn't figure out for the life of me wtf was goin on, so I decided to say fuck it and hit them with TONS of N for the first 4 weeks of flowering and bam NO MORE YELLOWING... Crazy on how much N this strain eats during flowering, I think alot of these fert companies don't know how and the hell to mix ratio's. Since i have started growing the rule of thumb is to cut the nitrogen out at first sign's of flowering but IMO that is bullshit, Just think that if you cut most of the N during early flowering then how is the plant gonna produce all those little GREEN leaves that come out after the plant has started to bud.. something to think about

thanks max and watch for the help..... Im gonna amp up the nitrogen by using the fish emulsion if I cant find it locally shit is sold out everywhere i go.... This is my first grow so I wasnt sure what to expect, up until now FF has been really good to me just gotta supplement with added nitrogen. All is good less panic over here thats for sure. One last thing I thought about why the plants directly under the light yellowed faster and my theory is those plants are growing more so there demand on nutrients is much higher???? Does this sound right??? thanks again

The type of nitrogen they use in grow big is easily flushed away

Gamebreaker,
I had the same issue. I flushed with sledgehammer, then next thing I know my leaves were yellow and twisted as all hell. I did some research and figured out that Yucca (The active ingredient in sledgehammer) lowers surface tension, and allows the release of electrolytes within the soil. My suggestion is to flush with sledgehammer, wait a half hour for it to settle, then flush again with pure water. This way the sledgehammer does not settle in the medium and cause the negative results we both encountered. Hope this helps!

I have found the natural soap from the Yucca plant does an excellent job in 'dragging' out the mineral salt bulid up, plant wastes and excess ferts in your soil. It also takes less time as you do not have to pour in 2X - 3X the soil volume like you might if you just use water.I DO indeed 'chase' out the Sledge Hammer with clear purified water, just because I didn't like the thought of soap suds in my soil. I have never had a problem, I use everything Fox Farm, yes it does make for yellow leaves late in flower...but that is the natural order of things...you want a Nitrogen deficiency late in flower...too much N will have negative results! I might also add that Fox Farm has an 800 number on all their products...I have called them with questions several times and they ALWAYS put you on line with a guy who KNOWS Fox Farm products and is very helpful...and he doesn't try to sell you more...sometimes he may tell you NOT to use something they sell in certain situations...if you have a problem with their stuff, and you believe you've done everything right...simply call them...it's a free call and they're all grow geeks that like to help.

Dude, Sledgehammer just killed my White Widow in coco. I can't believe it. The plant was super healthy, at 28 days in flowering, with nice nugs. Green leaves, healthy. I never used sledgehammer, always florakleen, so I gave it shot and tested it on one plant. The next day, she was all drooping, really bad, as if bone dry, but the coco was a little moist. Never over watered. I tried flushing the stuff out and let her dry, but she died. Turned brown and everything. Horrible.

Now, I can't remember if I put a cap full to 5 gallons, in my bucket or to 1 gallon in the watering pot. If it was in the gallon, then that is probably why it killed it, but if it was in the 5 gallon bucket, which I am almost positive of, then it would have been like half strength.

Nonetheless, I tested it on another plant at half strength, a different species, not marijuana. A plant that is better at abuse. It made that plant droop so badly, yellow, brown at tips. She survived, though, and looks fine now.

Needless to say, I will stick to Florakleen and going to try drip clean.

Promixs dosen't have no n.p.k, just saying

why did you flush at 5 weeks, does the schedule suggest this? this is when the weight starts to be put on, i make sure there's plenty of nutes for them at this time. if fox farm tells you to, drop fox farm is my suggestion. good luck

The light was too close bro and you bleached it also some minor nute burn. It wasn't the sledge hammer flush, whatever the fuck that is.

Whats up gamebreaker81 I know this is an old thread buuuuut,i just started using the sledgehammer flush its been 72 hours and my girl couldnt be any happier I used a gallon of sledgehammer mix per 5 gallon pot waited 1 hour then flushed with 3 gallons of water each then followed up with a 1/4 strength beastie blooms and now there lush mind you you this was a pre flush in week 2 of flowering to clean up my ffof ffhf mix

The yellowing is only a result of sledgehammer working in pulling everything out of the soil, no worries it's working properly but if you're following ff feeding schedule it states you nute after you flush to ensure your plants still have what they need to survive and produce without the added stress unless it's the final flush

Devlin1242 said:

The yellowing is only a result of sledgehammer working in pulling everything out of the soil, no worries it's working properly but if you're following ff feeding schedule it states you nute after you flush to ensure your plants still have what they need to survive and produce without the added stress unless it's the final flush

Click to expand...

...7 years ago bruh...

max316420 said:

I gave the ff lineup a try and noticed if you don't keep adding growbig to the mix then you will get yellowing. especially if your strain is a "leafy" one. I have a strain called Blueberry jam and have been having problems with it after switching to promix, kept getting BAD yellowing like 3-4 weeks into flowering and couldn't figure out for the life of me wtf was goin on, so I decided to say fuck it and hit them with TONS of N for the first 4 weeks of flowering and bam NO MORE YELLOWING... Crazy on how much N this strain eats during flowering, I think alot of these fert companies don't know how and the hell to mix ratio's. Since i have started growing the rule of thumb is to cut the nitrogen out at first sign's of flowering but IMO that is bullshit, Just think that if you cut most of the N during early flowering then how is the plant gonna produce all those little GREEN leaves that come out after the plant has started to bud.. something to think about

Click to expand...

(For shits & giggles)
was it more big bloom you gave to the plant to provide the additional N? If so.. how much did you give it compared to what you were previously giving it? Thanks in advance.

brimck325 said:

why did you flush at 5 weeks, does the schedule suggest this? this is when the weight starts to be put on, i make sure there's plenty of nutes for them at this time. if fox farm tells you to, drop fox farm is my suggestion. good luck

Click to expand...

Foxfarm is very efficient in that they split the individual needs of the plant in 2 to 3 week sections specifically homing in on exactly what the plant needs during each period. The sledgehammer is used to preflush to ensure the plant receives exactly what it needs during the weeks in which it specifically needs them. My suggestion to everyone is don't write off something because someone who has not tested or used the product says to do so. Many people just grow rather than garden and some are still going off of info from 40 50 years ago or what their pride tells them instead of at least testing something that is not only award winning in multiple cases but has had the control test results, research, and first hand use that not only shows but also certifies the organic product line.