Que carencia tiene???

It does not want nitrogen. Potassium and phosphorus, some magnesium possibly. Potassium deficiency starts with brown straight tips on leaves as well. Now if they brown, and curl up it is too much.

Hi! Pura Vida! 👋 Buddy to me look like a Magnesium deficiency According to... (Cockson et al., 2019, p. Initial symptoms developed withslight yellowing of the interveinal regions of the lower and older foliage). You can add a Mg or a CaMag suplement with you regular type of fedding,for fix the deficiency. if you need more information about nutrient disorders, you can read them in "Characterization of Nutrient Disorders of Cannabis Sativa" More info can be useful, week, medium do you grow and general picture of the plant to see better Bye and many successes!💪 References Cockson, P., Landis, H., Smith, T., Hicks, K., & Whipker, B. E. (2019). Characterization of Nutrient Disorders of Cannabis sativa. Applied Sciences. https://www.mdpi.com/2076-3417/9/20/4432

Add a P/K booster to your nutrient line up or increase the dosage if you are lready using one, this will help your plant. The damaged leaves will not recover, but it will help prevent it from getting too much worse.

Hungry for potassium. Not hungry for nitrogen, other leaves are VERY green, bordering on excessive amounts.