will runoff ppm tell me if i have salt buildup?

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biggerbud420

biggerbud420

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how can i tell if i need to flush for salt build up ? my plants are looking fine there 7 weeks old and i want to flip to 12/12 in a week i started feeding at 1/4 strength but the last 2 times it was half strength of fox farm feeding schedule
using fox farm soil trio liquid nutes i do not water till runoff
pro mix moisture control potting mix

1632176545694

INGREDIENTS​

  • Sphagnum peat moss (80-90% by volume)
  • Coir
  • Perlite
  • Ground Limestone (for pH adjustment)
  • Wetting agent
  • Mycorrhizae
 
Moshmen

Moshmen

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In my opinion I would and do always water till 20-25% runoff
And yes ck the ppm water goin in and then ck the runoff ppm - what’s the difference? I don’t like to let it increase past 50%
 
biggerbud420

biggerbud420

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In my opinion I would and do always water till 20-25% runoff
And yes ck the ppm water goin in and then ck the runoff ppm - what’s the difference? I don’t like to let it increase past 50%
so if the ppm is higher then what goes in i should flush ?
 
Moshmen

Moshmen

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so if the ppm is higher then what goes in i should flush ?
Say I put 1000 in and it reads say 1600 coming out well then I’ll flush a little and finish with the 1000 I started with! If it comes out 1200 I’m good - that’s just how I do it
 
biggerbud420

biggerbud420

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so i should just check runoff ppm and if thats ok dont worry about flushing ?
 
ComfortablyNumb

ComfortablyNumb

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so i should just check runoff ppm and if thats ok dont worry about flushing ?
When your runoff ppms are higher than your in ppm numbers, then yes, you need to flush because you will change the chemistry of the pot and the plant will suffer.
If you use 5 gal pots, then flush with 5 gal pot X 3 = 15 Gallons of clean water. You ideally want your out ppms lower than the in. That means the plant is eating what you are giving it.
 
biggerbud420

biggerbud420

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i have 7 plants in 5 gal fabric pots are you saying 3 gallons of water each or 15 gallons each lol
When your runoff ppms are higher than your in ppm numbers, then yes, you need to flush because you will change the chemistry of the pot and the plant will suffer.
If you use 5 gal pots, then flush with 5 gal pot X 3 = 15 Gallons of clean water. You ideally want your out ppms lower than the in. That means the plant is eating what you are giving it.
 
ComfortablyNumb

ComfortablyNumb

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15 Gallons each. 1 pot=5 gallons. 5x3=15 15 gallons.
 
biggerbud420

biggerbud420

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thats not gonna happen maybe i should just throw the plants in the trash lol im on well water no way will i be getting 105 gallons of water and no way will i pay for 105 gallons of water
 
growsince79

growsince79

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You might not ever need to flush if you water between feedings. I saw that promix at walmart. Scary looking stuff @ 90% peat. Some of them moisture control soils also have little watering retaining blocks that work great for house plants but not good for weed. I hope you added a ton of perlite.
 
biggerbud420

biggerbud420

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You might not ever need to flush if you water between feedings. I saw that promix at walmart. Scary looking stuff @ 90% peat. Some of them moisture control soils also have little watering retaining blocks that work great for house plants but not good for weed. I hope you added a ton of perlite.
i added 30 percent perlite these are my plants last night beginng of week 7 veg i have a post where i keep track of everything
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1632180477158
 

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