I have four strands growing goldleaf AK white widow blueberry all auto flower seeds they’re 10 weeks old they started to grow little white hairs two weeks ago but they seem to be stuck in the stage with the only growth are the leaves how do I get the ppm levels up without raising the dose of the fertilizer The lights are 18/6 the temperature is 72 to 77 with 40% humidity I’ve been told with auto flowers to just keep them on 18/6 from start to finish but does anybody recommend going 12/12? And any help on PPM levels would be appreciated
Thx!!!
I grow Photos and Autos on a 12/12 start to dinish. Bur I have 2 HLG lights.
PPM is a function of dissolved solids in the water. When you add nutrients the PPM will go up due to the salts from the nutrients. To get it higher, you simply add more nutrients. Folks check PPM to see how much nutrients plants are taking up and to target ~1000 ppm in flower. Autos are touchy so you want to be cautious with nutrients. You don’t have much time to correct issues if you over do it.
I grow photos only and push up to a point where I see a hint of burn on the leaves and back off a bit. I do this to max nutrients without harm to plants.
Might be good to fill this help ticket out. You might need a bit more help so a clear picture helps us. I know you have answered some of this, but it saves folks time not having to read through the whole post to see where it is at.
Strain?
Photo or Auto?
Soil in pots?
System type?
PH of runoff or solution in reservoir?
What is strength of nutrient mix?
Indoor/Outdoor?
Light system, size?
Temps;
Humidity;
Ventilation system;
AC, Humidifier, De-humidifier?
1 Like
Strands AK, Blueberry, Gold Leaf,
White Widow, Auto flower seeds
Using Bergman plant food flower fertilizer N 15 P 6 K 30 in 3 gallon soft pots indoor 32x32x64 tent
4” ventilation with carbon filter
Fans humidifier yes!!! no de-humidifier
Mother Earth soil temp gauge and
Humidity tester 74 degrees 40% humidity no PH run off small grow
2 1000 watt Led lights
1 Like
How do the AutoS look on a 12/12 cycle
If feel my Autos after about 14 hours of light they look Droopy and limp
Mine is happy. 
1 Like
I personally don’t worry about run off unless I see a problem. A lot of folks might not agree with this to be fair, but I do pretty well. I use soiless Pro-Mix HP and pH nutes going in.
Do you have a pH meter? This is an extremely important meter. They can be had cheap too. I use an Apera PH20, but if you buy some calibration fluid ( ph 7.0) then you can use a $13 meter if you check cal before use.
2 Likes
Yes I have moisture Light & PH tester !!
The type of meters that have prongs and stick in the soil (often called 3 in 1), are notoriously inaccurate. If that is what you are using I strongly advise you to get a dedicated pH meter.
2 Likes
Question to check the run off do you drain some in a cup ?