Correct way to flush using FF Sledgehammer

Then I’d go ahead and ph

Its for a high ppm spike that i cant bring down

Cool thanks

Hi so i did the flush on my plants. the ppm went down to 700 from 4000 and i did the feeding after the flush like you have done and two plants ppm jumped up, one is 1200 and the other is a 1000 after today watering. do i just water again and check runoff or can i continue feeding?funny enough the third plant ppm stood exactly where it was after the flush so i know i can feed it next time

You can feed again. 1000ppm is where I know they need food.

Ok…thanks

i flushed with ph water and sledgehammer one grow. next grow i just put those babies in the shower and ran that water until I thought it was enough. i let it all drain and then used sledgehammer in a gallon of water. next grow i just used ph water. i didnt see any difference. not a real study just trying to find what i liked.

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Yeah, I’m doing trial runs too.
Thank you

Whats wrong with my plant i use ff and i think it might be locking out some neuts from getting into the plant so im going to flush with 2 gallons of sludgehammer and the pot size is a 7 gallon grow bag its at like week 4 or 5 of veg im skipping this 5th week on this plant to flush.


Plz help me im so new

Dear Fox Farm, should I fertilize on the last gallon some people say yeah some people say no after I flush

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Hi everyone,

In theory it is not necessary to buy sledgehammer or clearing and salt leaching solutions. When it is time to feed your marijuana plants, water that has a neutral pH level should suffice.

That said, there is a lot more to it, so please have a look at our article about how to flush cannabis plants on our website.

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What makes people go against their feeding schedule? Wouldn’t they put 1/2 the amount on their schedule if we were supposed to use 1/2 the amount? I’m just genuinely curious as to why 9/10 people I see on here say that they alter the measurements of the nutrients on the feeding schedule. I feel like a successful company that specializes in growing wouldn’t put out an overbearing feeding schedule that needs to be altered by every person who attempts to use it. I’ve been using it verbatim and I haven’t had any problems. But I also didn’t feel pressed to try to outsmart Fox Farm and come up with my own feeding schedule, naturally assuming they probably know more than I do about their own products.

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The FF schedule is for photos. People adjust downward for Autos; there is not a FF schedule for Autos. Autos don’t need the full strength nutes as photos.

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Feed schedules are estimates and are too aggressive. These companies make money selling more product, not less.

The proper way to feed is to do so as necessary to maintain a runoff PPM of ~1,000. If a schedule gets you there, then good. If not, then adjust as necessary to maintain that 1,000 PPM target.

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Okay thank you

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How do you know which nutrients to cut back on to get 1,000? Do you just base it off of what stage they’re in? And should PPM go in at 1,000 as well with nutrient solution?

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Feed in your normal ratio of NPK and micronutrients.

1,000 runoff PPM should be maintained once you start feeding and the plant is large enough to withstand watering to runoff.

Feed as necessary to maintain a runoff PPM of 1,000. If your runoff is <1,000, then feed more to achieve 1,000 runoff. If your runoff is > 1,000, then feed less.

Sorry if this is a stupid question but by “feed more” do you mean give it more of the same solution? Or do you mean add more nutrients to the mix? I’m assuming you mean add more nutrients. If that is the case, do I add more nutrients altogether? Like just add a 1/8 tsp of every nutrient I am giving it at the time and then see where I’m at? Or should I add more of a specific nutrient?

Correct. A higher PPM feed, but in the same NPK ratio you usually feed.

Is the following correct? You need to account for the starting PPM of the water used to water. My tap water has a PPM of 300. Therefore I should try to maintain a runoff PPM of about 1300. Correct?

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