Just some free advice from an old pot farmer, I started in '77. Your Plants are Healthy but mildly overwet/low"N" I suspect so you need to get that sorted. But the first thing You must know is "Cannabis is horrible at managing her resources", if left to grow naturallly she will grow straight up(15ft tall) putting all of her resources into the Apical mainstem, her goal is to be taller than all of the other females to catch that boy pollen blowing in on the wind from males across the field...this is not what we want as Bud Farmers, as bud farmers we manipulate the Plant by topping, bending, supercropping we force her to manage her resources differently.(none of your plants are side branching).By multiple topping or just 1 topping she will redirect her resources to the new side branches (shes still trying to be tall for pollination). Mainstem Top, wait till the new tops grow 2 nodes top again and so on so on, when youve got 8 or 10 tops(or more) use garden wire bend them all down to the same height(creating a level canopy), the plant becomes confused because she no longer knows which branch is the Apical Main, she will then manage her resources equally to all of the new level Apical branches, You are forcing her to manage her resources. A multi-topped bush is your goal, round with many branches. Knowing the Plant first and how she grows naturally and why she grows that way is for her progeny (she is a wind pollinated annual). We farm Buds not trees... (if you know all of this sorry I wasted your time, but pictures are worth a thousand words, the pics of your plants at 3 weeks shouldve been topped already.) also to note, "Down to Earth" sells cheap, dry, slow release that is pretty good for organic grows (blended ferts and single ingredient) their Bio-Live is really good. good luck m8
thanks for the words of encouragement my friend.
got the lettuce.