Please see the attached picture. I think the plant is lacking phosphorus. I would appreciate if anyone who has experienced this to please help me out by posting. I appreciate the GC forum, but if your plants have never experienced this problem, please DONT post. Im not looking for educated guesses, rather I would apppreciate if someone who has dealt with this issue for themselves to post their remedy. I dont have time to experiment with guesses. I am not a dealer nor would I ever sell. I use for crohns and cannot afford to waste time on trusting someones educated guess, thats why i ask for anyone who has experienced this issue to post, only. No guesses, please. I have already lost 8 plants in 4 months, and i am not trusting peoples guesses anymore. Experienced gardeners ONLY, please. Thank you.
Looks like Ca deficit to me. We need all the info on your grow including: What type of medium; soil or hydro? What brand and type of soil? Indoors or outdoors? What strain? How old are the plants? What type of lights and how many watts? How far from the lights? What is your watering frequency and source of water? What, how much and when was it fed? NPK? What is the medium/runoff pH and PPM if in hydro? What are the temps and humidity in the room? What size pots? Any bugs? Look real close. Any other pertinent info? If any of these questions have already been answered please disregard as I cut and paste this for everyone. If there is leaf discoloration please TAKE PICTURES WITH ALL GROW LIGHTS OFF, ESPECIALLY HPS & LED's. Taking pictures and taking them with lights off, allows us to see what the leaf discoloration looks like.
I hope it is Ca deficiency, better that than Ozone or even the cursed 'Phosphorus Of Magnesium', of which I've yet to have experienced.Deficiency of calcium is somewhat uncommon indoors, but not uncommon in fiber hemp. Frequently, plants can process more calcium than is available. It also washes out of the leaves that are sprayed with water. Deficiency signs may be difficult to detect. They start with weak stems, very dark green 'foliage, and exceptionally slow growth. Young leaves are affected, and they show the signs first. Severe calcium deficiency causes new, growing shoots to develop yellowish to purple hues and to disfigure before shriveling up and dying; bud development is inhibited, the plants are stunted, and harvest is diminished. Growing tips could show signs of calcium deficiency if the humidity is maxed out. At 100 percent humidity, the stomata close, which stops the transpiration to protect the plant The calcium that is transported by transpiration becomes immobile. Treat deficiencies by dissolving one-half tea-spoon of hydrated lime per gallon of water. Water the deficient plants with calcium-dosed water as long as the symptoms persist. Or use a complete hydroponic nutrient that contains adequate calcium. Keep the pH of the growing medium stable.
