Welchen Mangel hat Sie?

DannywithaJ
DannywithaJstarted grow question 1y ago
My plant is showing signs of deficiency on the oldest leaves. I increased CalMag and nitrogen because of that. Thought it was the issue. Obviously not. Does anyone have an idea?
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Week 4
Leaves. Veins · Yellow between
Leaves. Color · Yellow
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Stonerapaisana
Stonerapaisanaanswered grow question 1y ago
Here's an easy-to-understand opinion without much fluff on what I would do: 1- Measure the pH and EC of the normal waterings, then do the same measurement on the runoff; it's always worth measuring both first. Based on the results, you have 2 options: - If either is off, you should correct it, and everything should be fine. Possible solution: Flush the soil with water that has adjusted pH and EC; this solution works for both adjusting pH and EC of the soil (in case there are too many mineral deposits). To prevent this, always water with pH-adjusted water between 6.2 and 6.5, and water until about 10% of the watering runs out the bottom (runoff); this prevents the buildup of salts at the bottom. - If everything is within parameters, then we have a nutrient problem effectively: (which seems very unlikely in your case), and then you can slightly increase fertilization, never forgetting the 10% runoff (to avoid salt buildup). I hope I was clear and helped. Best of luck!
BettyFlores
BettyFloresanswered grow question 1y ago
Hey, try doing a foliar feed with Epsom salt. You really can't go wrong with that and it can help your plant very quickly. Magnesium is a mobile nutrient and foliar feeding is very effective. I wish you lots of success with your grow 🌸
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Ultraviolet
Ultravioletanswered grow question 1y ago
A mobile nutrient that causes interveinal chlorosis that remains darker on the midribs working out to lime green is magnesium. Calcium Ca and magnesium Mg are both cations, meaning they are positively charged. While nitrogen typically forms covalent bonds in nitrates NO₃⁻ or ammonium NH₄⁺ depending whether it's synthetic or organic. Ph is all about balance. If you add 95% Cations to your medium which was alrdy at ph of 7 you are skewing the balance 7+. Closer you are to a ph of 7 the higher % of cations are in your medium. If you are at a ph of 6.2 and you added 95% cations to your soil ph would rebalance somewhere 6.8 and at 7.0 the cec would be 100%. Only mobile nutrient that fits is magnesium being on older growth. But I'd be checking my ph make sure she is in range.
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John_Kramer
John_Krameranswered grow question 1y ago
What if ? All ur problems due to CalMag? CalMag excess leads to K lockout At week 1-2 all was fine, then constant feedings with this shit made a buildup and now it looks like Mg deficiency, BUT it just can,t be! There is actually 2 options: -Ca buildup that leads to Mg,K lock -Mg buildup that leads to Ca,K,P lock I,d say its 2nd SO... Please THINK a little for yourself or u can use more CalMag shit or even epsom salt and we'll see u soon... Yeah...
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HandsomeTerpz
HandsomeTerpzanswered grow question 1y ago
Hey! It looks like your plant is showing signs of a magnesium deficiency, with possible early potassium issues as well. The interveinal yellowing (green veins, yellow between) is classic Mg deficiency, while the brown necrotic spots can appear later with Mg problems or also indicate low K. Since it’s happening on the lower/older leaves first, it’s definitely a mobile nutrient issue. What to do: Check pH – In soil aim for 6.2–6.5, in coco/hydro 5.8–6.2. If pH is off, nutrients like Mg/K can’t be absorbed even if they’re present. Add magnesium – Use Epsom salt (magnesium sulfate) at ~0.5–1 g/L in your feed, or a Cal-Mag supplement. Watch potassium – Especially important in early flower. Make sure your base nutrients provide enough. Monitor new growth – Damaged leaves won’t recover, but new leaves should come in healthy once the issue is fixed. I always recommend a foliar spray with Epsom salt or a solution like BioTabs Boom Boom Spray for these kinds of deficiencies. Have Fun and enjoy the ride! 😊
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