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are you facing the black in or outside?

Hi, I have a new property and I am considering to switch operations over there. Unfortunately there is no cellar. And growing would only be possible in 1st floor. And 1st floor has big and long windows which you can see from street. So is there any way to make the windows stealthy without...

Hi, I wondered how much ultra violet radiation is there in double ended HID or HID lamps in general? I already have glasses, but how about my plastic stuff in that room, will it degrade like when in the sun outside? e.g. I can buy a switch box in uv stable plastic and a not uv resistant plastic...

What is a rancor?

I did read that I can let the roots air prune without problems. Also I read that at least in the early phase of the seedling before they show their first pair of true leaves, no fertilization is needed. The plant lives from the nutrients in the seed leaves. I did an indoor grow with 50 seeds...

some pictures. But somehow I doubt that these are benficial. I flushed each single cube with ph adjusted water several times and squeezed them a bit. I lowered the HID light a little bit but reduced the wattage to 250W. Also I lowered the temperature to 21 degrees. I disinfected the basin...

I planted around 230 seedlings in rockwool. They are not growing but the leaves are turning yellow and more and more of the seedlings are dying. I already lost more than 30 because of that. I really don't know what it is. I have HID lightning 400W in 120cm distance. I have running a big...

I did read that some people buy fertilizer from JRPeters and save a lot of money. Can you recommend me some fertilizer for hydroponics (rockwool) so I can save money? I am based in europe. At the moment I use General Hydroponics Flora series. I already plan to make CalMag myself as I am using...

I will install the hps lamps today and put the seedlings under them. My t5 lights are fucking the plants up, as the light coverage isn't great and uniform enough. Some are stretching like shit. That needs to stop. Some stretch really strong and at the same time some get too much light...

you mean a hps for clones and seedlings? I have three double ended hps and one normal hps for mother plants. But I was thinking that this will burn my seedlings or clones.

My lights are 90cm only but the area which needs to be lighted is at least 100cm. Also it is around 50 cm wide... What light/reflector fixture would you recommend me for an area of 100x50cm? I will need it later also for propagating clones. So I will need to put the humidity dome on it. That...

The plants were stretching too much. So I lowered the lights. Now some of the plants leaves are curling down away from the lights. That means they get too much light? Unfortunately the plants which are placed at the ends of the lights are still stretching, what means they don't get enough...

I want to hang my lights up now. I have four ebb and flow tables. Effective grow area is 1.1m 1.x1m each.The tables are in a rectangular room all in one line. the walls begin 40cm from the sides of the line of the tables and are painted white. I have four medium adjustAWings double ended light...

ok thanks man. I will look at it later. And decide if it makes sense already

ok I did read that I shouldn't fertilize plants until the first set of true leaves shows up! Makes sense. https://www.thespruce.com/when-should-i-feed-plant-seedlings-1403093 Should I add a small amount of hydrogen peroxide into the ph adjusted water for the seedlings? Or shouldn't i do that...

It will be rockwool only.

I just had to edit my post before. Realized my tap water is ph 7.1. Is there a need to handle that somehow e.g. flushing? (or just reread the edited post before, where I explained my thinking) Can I direct the fan airflow directly on them? :-/

The dome is only for temperature? Anyway, I got rid of the lid. Now it is too late for presoak. And I am not going to start squeezing the cubes with the seedlings inside them. What a crap. The tap water I gave them has a ph of 7.1. I thought my device was not properly calibrated so I used the...

what do you mean by ph stable. The ph will change every day? I got cultilene rockwool which you don't need to prewash (like the grodan stuff). But you don't mean that?

Hi, my humidity dome is now filled with over 230 starter cubes (rockwool) which I soaked with tap water before putting the seeds in them. Temperature in the dome is set at 27 degree celsius or around 80 degree Fahrenheit. Now I worry that my cubes are maybe too wet or that the humidity in the...