Old President Outdoor

Week 22 Beginning September: entire week with temperatures >36°C (23°C at night) and sunny days, no really humidity. Daylight 12h43 : 7h37/20h20 (-2 min) Ventilation 24h/24 in the greenhouse 🧐 Problem: lot of dying leaves. From the bottom to the middle of the plant numbers of leaves become yellow, brown and quickly dies. This phenomenon is continue and look abnormal at this stage. - Water pH is ok between 6,3 and 6,5 - Ventilation ok. - I added some FishMix to correct an hypothetical nitrogen deficiency - the soil ph is may be wrong after amendment with Guano bat and Palm tree ashes (acid ph) - Thrips have perhaps weakened the plant. I treated the plant, sprayed a soap for plants. - heat or exposure are not the problem 🤔Thinking to a NUTRIENT LOCKOUT. All symptoms are corresponding to this. I chooses to flush one time the plant and give water during almost 5 days. It’s around 5 or 6 weeks more to achieve the flowering process: cleaning the roots before the last stage could be a solution if I want to give the last nutrients for a good flowering finish. SLEEPY JOE show signs of a good flowering: developing long white pistils. No more dying leaves. For now this phenotype is the most resistant of the session. I’ m looking the daily evolution