White (Widow) and Black (Sugar)

Hi @NullHypothesis! With good genetics I'd say 3 weeks, but every strain + environment + grower's ability is different! Mainlining is a rewarding approach, you'll have a beautiful and heavy canopy! Happy growing 👊

Hello @NullHypothesis ! Yes you can experience deficiencies from super soils but having a deficiency doesn't necessarily means that your soil doesn't have the nutrients. Deficiencies can also come from over/under water and other reasons. What recipe of super soil you use? If you made your own you might didn't use enough amendments. Also did you let your soil to compost before you use it? If you didn't then the nutrients in your soil might not be available for the plants yet unless you used fast absorption amendments like blood meal, guano's and stuff like that . I wouldn't advise you to use any PK since the philosophy behind using super soil is to avoid bottled nutrients. First check your watering cycles and second use a basic compost tea. It will give to the soil large populations of beneficial bacteria that will brake down the organic matter very fast. Happy growing ! 👍

Hi @NullHypothesis! You are right, it looks like a Calcium deficiency. The weird thing is that this deficiency only shows up onto new leaves, whereas you seem to be having issues with old leaves. Now the big question is: what could have led to this situation? Have you been giving some extra cal+mag during the growth? Your pH looks fine, are you using RO water? Could it be a potassium abuse, making the rootzone unable to handle calcium intakes anymore? You can add some cal-mag or epsom-salt into your next feedings, it's probably a bit late because the deficiency has been there for a while, but it worth a try, Happy growing 👊