BCN Critical XXL - Back to basics

- As you can see, discolouration has continued. It begins on the lower leaves and is slowly moving up the plant, one node at a time. Let's dismiss root and lock out issues for the time being and assume it is an immobile nutrient deficiency (N, P, K, Mg and Zn). Mg and Zn deficiencies are somewhat rare and likely not the cause. Based on the discolouration pattern and the age/stage of growth, a likely cause would be N deficiency. - Remedy is the a light feeding of Grow and Algamic. Nice and easy at first while we keep an eye on how the plant reacts. Ideally we'll see the discolouration slow down or at least stop. - Transplanting to the 16L pot has been delayed (because of lockdown and being able to get supplies), which probably contributes to it. I wouldn't be surprised if the small 3-4L of soil is spent of nutrients as the plant gets bigger. - Tent temperature and humidity have been high, warm weather has brought the intake temps up by 3-6 degrees pushing the tent temp close to 29-30C most days. Not ideal, but the plus side is there less variation between night and day temperatures.