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Using Lucas Formula Having Nitrogen Deficiency


New Member
using Gh Lucas Formula. days of grow every thing look great, im more then 2 weeks trying to solve this Nitrogen Deficiency (now week 4 bloom) i add in the last 2 weeks 7-10 ml pr liter of G but down leaves keep yellow.

water out ph is 6.5 growing in coco (led light, tempeture etc is normal) till last week got water and food every hour Alternately. for the last week food every hour, till not change. but leaves continue yellow slowly..



New Member
btw i try to dwon ph to 6.0-5.8 and add mycorrhiza
ill try to wait few days may be then ill change wht do you think?


Member of the Month: Jan 2013 - Plant of the Month: Nov 2016, May 2018 - Nug of the Month: Mar 2018 - Creme de la Creme Photos: Oct 2016
Need some pics and more details of grow. What medium, system? Exact nutes, how much light?

Yes ive tried lucas formula but had problems with N deficiency. Its only suited to cuts going straight to flower imo. Theres a reason we use full nutes and thats because they need all macro nutrients for plant health.
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