depends on strain & where you are you are at in your grow. i usually use my pen as a gauge of how much nutrient plants are taking from solution. from there i adjust accordingly
hows.your.roof Reviewed by hows.your.roof on . First time grow KC Brains Skunk #1 & White KC Hi All This is my first grow seems to be going alright. I did also have some NL during germination & propogation but they all failled to make it to seedlings. WIll have to do a dedicated NL grow with the rest of my seeds as I reckon I know where I made mistakes. These seedlings are about two weeks old and as I say it seems to be going ok but a couple have started to droop a bit since being put in the larger rockwool cubes & te NFT tank. They are under a 250W MH bulb by Solarburst Rating: 5