What deficiency is this ?
- Thread starter bbrandon888
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bbrandon888
Well-Known Member
Okay should I top dress calcium or foliar spray ?
Jylhavuori
Well-Known Member
If chelated calcium, foliar is good for first aid. But anyways, top dress it.
Skunkee101
Member
Calcium is considered an immobile nutrient in plants. This means that once calcium is incorporated into plant tissues, it cannot be easily moved or redistributed to other parts of the plant, especially to younger, developing tissues. Deficiency symptoms, therefore, tend to appear first in the newest growth, such as young leaves, buds, and root tips.
Therefor you can't foliar spray Calcium at all, the only way top give Calcium to plants is through the roots.
But? it's a Calcium deficiency for sure? how to know you don't give us any data of your grow
7CardBud
Well-Known Member
One old bottom leaf is nothing to be worried about. Older shaded leaves will be dropped by a fully healthy plant as it is unproductive.
Post of pic of the middle age growth that is receiving the most sun. Those leaves are the main producers for your plant and what I would be concerned about.
Post of pic of the middle age growth that is receiving the most sun. Those leaves are the main producers for your plant and what I would be concerned about.
Hook Daddy
Well-Known Member
I’m not so sure that statement is true. You foiler spray tomatoes with calcium for blossom end rot. There are TONS of university studies on spraying apples and other fruit trees and plants with calcium and cal/mag. Are you suggesting that cannabis is different from all other plants or just spreading bro science?
Here’s a bit
foliar application of calcium can improve physiological characteristics and consequently increase yield. The most important advantages of foliar fertilization are to improve plant growth and crop quality, appropriately manage the nutritional status of plants, and regulate nutrient deficiencies. Soil application of calcium can increase crop yield as well as improve soil conditions, while foliar application has more advantages in correcting deficiency disorders of Ca.
"https://www.nature.com/articles/s41598-023-47855-6#ref-CR9”
Another study found this:
The effects of spraying calcium fertilizer on the photosynthetic characteristics, mineral element content, sugar and acid metabolism, and quality of apples were assessed. Fuji Apple Tianhong.2/SH/Malus robusta (M. robusta) was treated with the calcium fertilizers Niucui (Ca ≥ 100 g/L, B: 1–10 g/L) and Naipu 9 (Ca: 90 g/L, Mg: 21 g/L, N: 110 g/L) at the young fruit stage (25 May), the expansion stage (5 July), and the coloring stage (25 September). Water was sprayed as the control application. The results revealed that spraying calcium fertilizer increased the chloroplast pigment content and photosynthetic capacity of the apple leaves. Compared with the control, the net photosynthetic rate of apple leaves sprayed with Niucui increased by 4.3–34.6%, and that of leaves sprayed with Naipu 9 increased by 15.0–57.4%. Spraying calcium fertilizer promoted the accumulation of Ca, Mg, and B mineral elements in leaves and fruits while inhibiting the accumulation of Cu. Spraying calcium fertilizer improved the quality of apple fruit.
I could go on and on, but calcium can be foliar sprayed on plants and effectively aid with deficiencies.
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Skunkee101
Member
First it looks more like a Phosphorus deficiency, so spraying an immobile nutrient (Calcium) that's not even missing is just not very smart, some scientists say that because Calcium is immobile it's more effective to give Calcium through the roots than foliar spray.
Calcium does not improve physiological characteristics and consequently increase yield. Calcium is just an essential nutrient that must be present in the nutrient solution for proper growth and propagation.
"There are 17 essential nutrients that plants need for healthy growth and survival. These nutrients are categorized into macronutrients (needed in larger quantities) and micronutrients (needed in smaller quantities). "
warble
Well-Known Member
I would mix some epsom and calcium in your next feed, you could do a foliar. That could help, but she looks fairly healthy. What I am worried about is your plant is outdoor. What is your pest mitigation plan? The sulfur in the the epsom could help, but you might wanna clear out some of that growth near by, and get some systemic pest control in that plant before she starts to bloom. I use SNS 209 and neem, but it looks early in her cycle. You could use some more powerful pest control at this point. Please do not give her pesticides when she flowers.
Hook Daddy
Well-Known Member
I never once stated the issue with this particular plant was calcium. I also didn’t state calcium in any amount delivered in any way will increase yield. I stated your comment that calcium cannot be used as a foliar spray is incorrect, that’s all, it’s science and really not debatable.
Skunkee101
Member
Cannabis growing used to be relatively cheap and fun, not anymore if you don't take care.
I never lollypop, LST etc because is just boring and useless, have better things to do, I got decent results with my methods, I found a brand of soil very good that always give the same good results and is way cheaper than your Biobizz stuff and your worm poop.
I dont understand people buying growing systems that are 1000 dollars per 100 watts of LED lights, this is getting ridiculous.
I never lollypop, LST etc because is just boring and useless, have better things to do, I got decent results with my methods, I found a brand of soil very good that always give the same good results and is way cheaper than your Biobizz stuff and your worm poop.
I dont understand people buying growing systems that are 1000 dollars per 100 watts of LED lights, this is getting ridiculous.
hostagecs
Well-Known Member
what does this have to do with anything?
Hook Daddy
Well-Known Member
Lol, who are you talking to, yourself? You must have run out of better things to do. No one here mentioned biobizz, worm poop, led lighting, or a single thing you just rambled on about. I’m glad you get “decent” results. That’s not good enough for most of us, but if you’re happy with it that’s all that counts.
Budzbuddha
Well-Known Member
Brawndo - thirst mutilator
bbrandon888
Well-Known Member
I bought bought some build a soil bloom. I’ll use that today and see if it helps my plants
