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Ok. Finally my work for construction and testing is over. 20cm×50cm 8×14 diodes 17%blue, 19%green, 64%red 163watt 463 umol/s; 2.84 umol/j

I was working on my new LED fixture project today. The fixture i had made several years ago needs some improvements. It was 20cm×40cm, 630 umol/s, 273 watt. The new one is going to be 20cm×50cm, 440 umol/s, 150 watt and 800$. It is 30% more electrically efficient than previous one. I told...

I have my own strategy to take clones. I've explained it before but let me show you here. The head is the clone I'm preparing. As you can probably see I've taken i ts bottom leaves but not its auxiliary buds. Auxiliary buds which are full of growth hormones will make strong root system in just...

A clone ready to be cloned again 20 days after cutting from its mother.

Hello again everyone. I have many projects during this grow of mine. One of them is to find highest possible N/E ratios for all elements which support optimal growth where N is nitrogen concentration and E is each of the rest essential mineral elements concentration. If we compare our ratios...

Hello everyone 1.0;) year ago when i was runing out of calibrating solution i decided to make one while my meter was still calibrated. I took advantage of Aqion.onl to make a 5.00 mS/cm at pH 6.86 in 25 C using potassium dihydrogen phosphate and potassium hydroxide. It's the solution my meter...

They are flowering with 5 mg/L phosphorus. The tips are getting slightly yellowish but I'm not going to increase P as i don't think it is P deficiency. Perhaps they need more than 10 mg/L sulphur.

concentrations are in molar unit.

This is a better view. The light is 275 watt and it produces 630 umol/s as i hope I've calculated correctly. Can someone estimate my yield? canopy is exactly 0.50 m2. Day 39 of grow from seed and 7 from 12-12 cycle.

Oh, man. These are my plants. Toker1 are you still here? I'm Iammygod back to growing after many years. This time i have a handmade LED fixture. It is 273 watt. genetics is Cloudwalker. Canopy size is 1.0x0.5 m2. Estimate my yield in this grow please. Here is a pic of my grow at day 38 from...

Cloudwalker, day 38 from seed; 6 days into flowering. Those cuttings are 12 days old from the day i cut them from their mothers.