This is on 1 plant on the leaf.

Hi there ! Your biggest plant needs a new pot , transplant her and give her some nutrients , she will love it especialy if their is Calcium & Magnesium in it ! The 2 little plants looks healthy but I would check the PH to be sure it is between 6.0 and 6.5 ! I hope it will help you to make a killer grow !!😁👊

It can be calcium deficiency, give some egg-shell she will love it !

Hey so all your stats are looking good, the only things that stood out were the small pot size and the possible need for transplanting. And the somewhat low night temp, many molds and bugs can flourish at the 60 degree range. Household nutrients? Chicken manure for nitrogen. Dried coffee grounds for potassium, magnesium, nitrogen(will affect ph), fire pit ash for potassium and calcium (will raise ph). Epsom salt for magnesium and sulfates. Pine needles for nitrogen and they decrease ph. Egg shells for calcium. Molasses for much needed sugars in flowering stage and also feeds your micro activity. Happy growing.

If you’re not adding anything to the soil yet you shouldn’t be watering to run off. You want to keep as much as the organic life in the soil as possible. Get yourself some organic backstrap molasses you can use these the entire grow to feed the micro life. As for other nutrients if you want to keep it organic you have lots of choices from the garden centre (work casting, insect frass is great!) Or you can go to greenleafnutrients.com and get yourself a free sample of there MEGACROP which will get you from veg to harvest with a 1 product nutrient... good luck dude!

banana peel tea is a great sauce of potassium that keeps bugs away and fattens up buds doe

Watering is most important IMO. The plants will grow pretty well if you just water them properly. PH'ing the water is probably the next most important. After that comes nutrients, etc... But nutrients are not the difference between life and death, they help sure, but watering is most important. If you are seeing brown or burnt edges on your leaves your nutrient levels may be too high. Or your soil may be too hot (too many nutrients in the soil). If you are composting, you could create a compost tea and use the compost tea for feeding your plants. Otherwise, I'd recommend using a nutrient brand from a manufacturer that has been known to work well with cannabis... BioBizz, Remo, GH, Canna, etc... Good luck! 👍