hey guys/girls, I am growing texada timewarp this plant is about 5 weeks old -using pro mix HP. - ph is a little low (5.5) - using general organics line of ferts + cal/mag - temperature during the day is about 15 degrees not getting above 20 Celsius I am keeping them outside and bringing them indoors at night, as it is a little to cold for them. As you can see on the new growth the leafs are curling up and yellowing slightly on the tips. I thought it might be nute burn but it seems strange because I having fed the plant in roughly 1.5 weeks, this curling literally showed up overnight. Any thoughts would be greatly appreciated!
It's not nutrient burn. It could be from underwatering. It's only a mild case and they'll certainly turn out ok.