On 2/27 I noticed some deficiencies popping up again. I mixed .5ml calmag/gal, .5gr/gal Epsom and 3gr/gal MC =1.16EC, 824PPM, 5.75PH and had Runoff = 1000 ppm, 6.87ph
Yeah... Not good at all so I ran 2 gallons of feed water through each of them to help flush some excess salts. I added 1 tbsp of Espoma soil acidifier to the top of bucket to help control the rising ph. On the plus side it adds sulfur to the substrate.
2/29 I mixed .5ml calmag/gal, .5gr/gal Epsom, 1gr/gal Ammonium Sulfate and 3gr/gal MC =1.23EC, 940PPM, 5.83PH
The ammonium sulfate is 24% N, lowers the substrate ph, and provides a different source of N than what is in MC.
3/04 I mixed 3 gallons spring water, 3gr/gal MC, 1 gram ammonium sulfate 915ppm, 5.55ph
3/05 The end of this week the girls were looking great, growing well, and were ready to flip to flower. So I hung up my second light, built my SCROG nets, got them settled down on the girls and prepared for launch.
Why not just go right in to the 3gal pots?
I do and its very nice not to worry about transplant.
I'm even dialing in how much water to give each week pretty nicely
@MrHightimes, I grew 6 autos right before this grow and planted them straight into the 3 gallon buckets. Because they didn't take much water for the first month I ended up with a lot of salt build up that caused issues before I could identify and correct.
I figured, the solo cups would allow me to water to runoff and avoid the build up.
I'm about to try some Megacrop here soon.
My friends are growing some pretty plants with it
my 9 part GH does nice but its ALOT and the ppm is so high!
@MrHightimes, Megacrop is great but keep some extra calcium and Epsom salt on hand if you're using RO water.
If you haven't ordered yet, I would suggest getting the 2 part MC so you can reduce N levels and up PK during the later stages of flower.