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Hi. my lux meter measures 60k lux from a 600watt MH bulb in the center of the canopy and 20-30k lux at the corners of the 3.0×3.0ft area; the protection glass between bulb and canopy has been removed. Should i buy a bulb or not. It has been +2k hours in operation.

Hi. i wanna know how fast(or slow) i grow. Actually i need to know my speed. my clones are 34 and 40 days old; big ones on the pics are older. It's 7 days after ive initiated 1212 cycle. They cover 2.5×2.5ft now; 4 plants ​​​​

Hi.​​​​ Now that i know how much i need of these 10 bottles i have i want to combine them reducing number of bottles. What do you suggest? Potassium Silicate Sodium hydrogen Carbonate Phosphoric Acid Citric Acid Potassium Chloride Potassium Sulphate Potassium dihydrogen phosphate...

Hi. Although compounds that i use have less chance being as pure as they claim; at least some of them, but i can say that the below chart is what im feeding for mid veg in coco The day time air temperature i measure is 28-32 and night temperature 24-26; daytime RH 40-45%; and around 50-55%...

Hi everyone. Its the first time I'm planning to use silicate. after adding 0.25 mmol/l K2O,3.13SiO2 to the RO water, ph increases from 7 to 9.3. Adding 0.625 mmol/l H3PO4 decreases the ph to 6.8. Dissolving 2.0 mmol/l Ca(NO3)2 | 1.5 mmol/l Mg(NO3)2 | 0.25 mmol/l NH4NO3 and finally 0.75 mmol/l...

Hi every1. it contains: ● 3.2% Calcium derived from Calcium Nitrate, Ca(NO3)2. Calcium Nitrate has N/Ca ration of 28/40. ● 1.2% Magnesium derived from Magnesium Nitrate, Mg(NO3)2. Magnesium Nitrate has N/Mg ration of 28/24. Applying 3.2% Ca from Calcium Nitrate and 1.2% Mg from...

Hello every one. Ever Thought investing with a FLIR to be able to measure VPD in your garden? Can you guys talk about Pros and Cons of this idea? Im planing for pounds of buds monthly and i think FLIR can be a very effective device as growers need it to accurately calculate VPD. I'm specially...

My plants are in day 64 of veg 20-4 schedule light. Im not ready to initiate flowering yet but today i saw these pistils as pictured below. I dont know what i have to do now. Should i initiate flowring or i can back to veg by continuing 20-4 schedule. Why did they start flowering?

Hi everyone. A girl of mine under LED has a symptom at mid to top of her. Any explanation please? What should i do? It's spreading too fast and i dont even know what it is. Mn deficiency?

Hi. I have plants both under HID and LED in a tent. Generally, leaves under HID light get warm more than LED. I'm also running CO2 manually and because of that i need higher light intensity as normal. I know when plants get high level of light they need warmer temperature and reletitive...

You may know VPD determines the transpiration rate. With brighter light leaves get more light (and it increases leaves temperature) so they need more CO2 to perform photosynthesis. To absorb more CO2 stomata need to stay open. But as leaves temperature increases by brighter light, leaves vapor...

You may know or not, it's my first grow. I'm just done with my first defoliation too. It taught me so many things. Defoliation lets the lower growth tips to breath CO2 getting light and become a cola, No fan leaf is able to become a cole. I think lower fan leaves and the ones have been blocked...

It's getting cold here. There is a label at the back of my gas heater that uses NG saying 3600 Kcal/hr. I checked my gas station and found 8600 Kcal/m3 when my specific NG(must of it is methane, CH4) is burning. burning 1 mol NG produce 1 mol CO2 CH4 + 2O2 = CO2 + 2H2O 3600 (Kcal/hr) / 8600...

Hi everyone. I've seen some of you guys have excellent plants and fantastic experience. I really like seeing pics of yours... green and well-trained ones. I want to ask you to upload your pics if possible so we have a album of girls here. Here is mine after 2 weeks of wrong ph at root. She has...

I got many problems these days with root ph. My runoff ph is lower than 5.3 and it is not going to go higher Though I'm feeding my plants using 6.4 ph water. I also have almost heavy Ca deficiency as i pictured below. What wrong i did, i asked myself. when i was washing my coco i found 300g...

Hi guys. I got a bit confused. How much air/water flow i need for a plant in DWC? it depends on CO2 level? Give a range please. i wanna buy "General Hydroponics GH4720 Farm Controller, Terra Cotta" from Amazon. Is it a good option for me? Idk how this system makes water to flow using an air...

What dose 'too much light' mean? Which physical parameter is related to 'too much light' term? I think 'too much light' that cause light stress on plants relates to intensity and duration of the light simultaneously not separately. I think total light that plants get in a day determine how...

Hi everyone. I started germinating my seeds on 9 Oct directly in Coco/Perlite mix, 1st grow. After 2 weeks applying 0.6 dose recommanded by GH even with 2 times more CaliMagic dose i used i saw Ca deficiency, brown spot and culing up on leaf, on 1-finger leaf in one of my seedlings. After that...

Hi. I just built my 1st grow tent, 3.5'×3.5'×6'7". I have a Platinum P450 and a 600watt VIVOSUN MH/HPS kit, Coco coir as medium and Flora Trio/Calimagic as nutrient/Supp. Rest are not important somehow in here. also have 7 feminized seeds. 3 of em Critical kushs by Barney's Farm and 4 of em...

Spectrum and intensity both matter to our plants and us indirectly. Assume we cant change spec as each light technology has its own unchangeable spec(almost) But we can change the intensity by using more power lights. The lights with the same technology that consume more watt give us the same...