What are proper ppm/ec levels for different phases of growth

[CookieMaster]

It's been awhile since I've messed with hydro and I want to make sure I don't burn anything. If a poster could let me know the correct levels for clones, veg, early flowering, late flowering, etc. Some generics would be helpful. I know if that isn't enough I can gradually increase the dosage. Thanks.

 

[jcdws602]

PPM for Hanna Chart PPM


Seedlings, Early Sprouts 100 to 250

Early Vegging 300 to 400

Full Vegetation 450 to 700

Early Blooming 750 to 950

Full Mature Blooms 1000 to 1600

 

[fatman7574]

About half the stregth normally recommended by most growers, however the above are not absurd. I read alot of post where people will almost double the above numbers, or so they say. Most likely those growers do not even own a conductivity meter.

 

[Illegal Smile]

I wouldn't use a nute product if I didn't trust the maker enoughto follow their feeding schedule. And, if I follow their schedule and change my res weekly to reset nutes, I don't have any need for a meter. I have one of course, but seldom use it.

 

[fatman7574]

Wow! I won't even comment on that! RO water?

 

[jcdws602]

About half the stregth normally recommended by most growers, however the above are not absurd. I read alot of post where people will almost double the above numbers, or so they say. Most likely those growers do not even own a conductivity meter.

It is very dependant on strain of course,some of my strains I won't even get close to 1000ppm in full bloom and some of my strains can handle 1000 + in full bloom

 

[fatman7574]

So many things can make a difference. Method of grow, state of growth, root conditions, temperature, humidity, strain, CO2 levels, different formulations, TDS of water and of course lighting and cycle lengths. Want to really be surprised check out high pressure aero or atomizer grows. Top TDs about 500 to 600. Using only intermitient spraying so total water used is about 10 to 20 percent of that with standard hydro or low pressure aero. Spray warmer water say mid 80's and use goes up as does growth speeds but still much lower water use than standard hydroponics etc.

All the s things that can make things different and still people follow manafacturers labels based upon some unknown average needs. Go figure. What is a normal average with that many variables having effects.