Chat

By continuing to use the website or clicking Accept you consent to our cookies and personal data policy. For details please see Privacy Policy

Grow QuestionsShe has an issue that is progressing from the bott...

She has an issue that is progressing from the bott...

Fingersstarted grow question 5 years ago

She has an issue that is progressing from the bottom of the plant up affecting older leaves first, which is leading me to think mobile nutrient deficiency? Her upper leaves are also standing so upright that they are blocking light to the budsites.

Solved

Week 8

Leaves. Color - Mottling

HighTVanswered grow question 5 years ago

As you already know the mobile nutrients in plants are able to be pulled from lower/older growth to be given to the Fresh top growth as a survival mechanism. Identifying that you problem started at the bottom is a huge help! I was also very smart of you to leave some fan leaves at the bottom when you lollipopped to leave 'detection leafs'. The primary mobile nutrients are: Nitrogen, Phosphorous, and Potassium. Magnesium is the only secondary nutrient that is mobile . In Micronutrients Chlorine, Molybdenum, and Nickel are mobile. These are the 7 Mobile nutrients in cannabis and one of them is responsible for your plant! --- After eliminating all the choices that do not cause Chlorosis(yellowing) in the leaves and the micro nutrients that comes in most tap water. That leaves us with Nitrogen, Phosphorous, Potassium, and magnesium to explain The lower leaf Chlorosis. Phosphorous and Potassium deficiencies comes with signs of Necrosis(death) on the leaf edges so we can eliminate those. This leaves us with Nitrogen and magnesium both of these explain the lower growth leaves that are fading however Nitrogen is very abundant in GH Flora micro and you are feeding plenty of it. Magnesium also causes the Chlorosis to bleed from the leaf tip edges exactly like you are seeing that Is why I am confident in saying Magnesium is the source of your MOBILE deficiency. --------------- Now about that immobile deficiency you have there! If yo look at those leafs showing Chlorosis AND Necrosis Dots all over this is from a textbook Calcium deficiency! Its an immobile nutrient show its showing symptoms directly on the growing leaves that need Calcium. This one always looks mobile because it doesn't effect the new-growth leave. The solution is to give more CaliMagic as it contains both of these deficient nutrients! You are in the normal .5-1tsp per gallon range so you can safely go up to 1tsp of calimagic per gallon! Hope this helps man! 😎

2 likes

Complain

Selected By The Grower

Stickanswered grow question 5 years ago

Hi @Fingers! At first sight it looks like a Magnesium deficiency. But looking at the amount of nutrients you gave for the last weeks, my bet is that you're having some salt buildup in your medium and/or a rootzone issue such as fluctuent pH due to a bad watering routine. In the first scenario, a good flush with plain pH'd water, up to ~50% of your container's volume will solve the problem and get rid of the extra salts in your rootzone. In the second scenario, pH fluctuations can happen in coco if you don't get a good runoff each time you water, so just increase the volume of your solution each time you feed them. Usually with autos, less is more, it's easier to fix a deficiency than to recover from a toxicity. Hope this will help, keep us up-to-date and happy growing 👊

1 like

Complain

OutForRealanswered grow question 5 years ago

Hello ! You are right in your diagnosis, when the issue start from the bottom to the top then it is a mobile nutrient related issue in general. From what I can see you seems to have a Magnesium deficiency at a late stage , the signs are the purple stems of your leaves + the irregular spot and yellow colour. From what I've been told the Cal mag amount of a solution should represent at least 0.3 points of EC so if your level is lower it will lead to a deficiency. Now concerning the praying leaves it is generally a sign of heat stress or a light too close from the top of the plant but your temps and distance are both correct so it makes me think that your humidity level may be too low ( from 10 to 20% ) so they reacting to the lack of humidity by praying to limit evaporation. According to me you should increase your cal mag level ( not the Ec level but the amount of cal mag in your 2.28 Ec) and find a way to increase your humidity like a humidifier. I hope it will help you 😁✌️🏼

1 like

Complain

Similar Grow Questions

Solved