Week 5 Flower Brown Leaves

Your feeding ratio is wrong. Flowering npk is 1-2-3. Cal mag is probably a good product to use as well. Would also check ph.

Revise su diario. Esta regando con un ph de 6. Suba unos puntos su ph entre 6.2 y 6.5. De este modo el calcio, el magnecio y potasio estarán más disponibles. Leí que su lámpara está a 35 cm si esta a la potencia máxima puede bajar un poco la intensidad o subir la altura a 45cm. Creo que esta observación puede ayudar. Saludos.

A combination of nitrogen toxicity and cal/mag deficiency.

Looks like a calcium deficiency to me. Your best bet is to increase your dose of Cal/Mag immediately. You can also go to your garden center and get a calcium foiler spray which will provide immediate absorption for your plant. I generally do not like to do this when flowering but you can easily hit just fan leaves. Spray at night when lights are off. When you water next, over water by about 20% and test your run off. If off, correct your mix accordingly to bring it back into normal ranges. Hope this helps.

your ph could come down a bit to around 5.8 this would be better for optimal nutrient availability as for deficiencies I can see a slight calcium problem so yes a calmag additive would be a good idea mate