Living soil rookie needs help.

ThatDudesDad
ThatDudesDadstarted grow question 5d ago
Plant is Notoriius THC. I am growing in living soil. Bottomfeed wicking. Week 4 of flower. Can anyone tell me what I’m doing wrong here. Plant stays pretty pale. Small spots on top leaves. Seems like slow growth. I’ve top fed with worm castings girl flower power. Thanks
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Altitonans_Fulmen
Altitonans_Fulmenanswered grow question 5d ago
Mixing top-dressing with bottom-feeding creates a major issue with Electrical Conductivity (EC) and salt buildup. Bottom-wicking pulls water and minerals upward. As water evaporates at the surface, it leaves behind a crust of concentrated salts. Without regular runoff, unused nutrients accumulate in "dead zones" at the top. The moment you water from the top, you wash that massive wave of salt straight down into the roots, destroying the EC balance across the whole pot. Stick strictly to one delivery method, or plan a mixed approach from day one. If you must top-dress while bottom-feeding, you have to flush with top-watering periodically to manage the salt crust. However, avoiding this mix altogether is highly recommended. When EC is ruined, the osmotic potential in the root zone breaks down, stopping the movement of water. Without proper bulk water flow, the plant loses its photoprotection and ability to take up nutrients. The plant switches from aerobic respiration to anaerobic respiration. Energy production plummets from 38 ATP to just 2 ATP. Growth completely stunts. As water stops moving, the pH skews. The plant relies on evaporation rather than healthy transpiration. It begins pulling mobile nutrients from old growth to feed itself, creating a confusing mix of random deficiencies that look like classic "Cal-Mag" issues or lockouts. The issues here go beyond simple tip burn; the plant is experiencing severe hormonal and meristematic disruption driven by localized pockets of salt. This stress is actively disrupting the plant's phyllotaxis (its natural leaf and branch arrangement). Small, random orange necrotic ruptures under the leaf skin point directly to high salinity messing up the plant's internal waterworks. Organic living soil requires substantially more oxygen in the rhizosphere than synthetic setups. If the soil is too wet, too hot (over 22°C / 72°F), or "too alive," the rapid microbial activity creates excess heat and depletes oxygen. This causes a sharp drop into acidic pH zones, visible as orange burnt tips and yellowing. It is easy to see how much passion and hard work you have put into this plant. Navigating these root zone issues is tough, but getting that watering and salt balance sorted out will get her right back on track for a great harvest. Gluck.
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AuTelemeNtRaffitsch
AuTelemeNtRaffitschanswered grow question 5d ago
Could the soil possibly be kept too wet and also too hot?!
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MindFlowers68
MindFlowers68answered grow question 5d ago
Notice how the uniform yellowing of leaves sat to it showing from bottom up which would indicate Nitrogen deficient, the lack of mag and iron is prohibiting efficient chlorophyl production causing them all to be slightly less deep green
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MindFlowers68
MindFlowers68answered grow question 5d ago
Yeah i was thinking mag and or iron deficiency. Epsom salt may perk them up a bit Some liquid amino acids and fulvic acid should help too
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00110001001001111O
00110001001001111Oanswered grow question 6d ago
Seems relegated to the top. Also see stretch then tightness in nodes indicating needing more light then giving too much light... if you haven't further adjusted the light since vertical growth slowed, i'd dial it back slightly as it might be part of what you see. These symptoms don't lead to a solid diagnosis. The location is odd. and looks like more than just interveinal chlorosis. I'm guessing too much light. Lookat at week 7 also makes me feel that way.. super tight at top and the damage is on the most exposed leaves. Could have more than one thing going on. leaf symptoms are not discrete.. you need to eliminate possibilities with all the extra info and familiarity you have with your grow compared to this 280 character limit. Growth could be slowing down simply because it's 3-4 weeks into flower. i measure weeks after the complete, you may be marking them at the start of the week, but regardless of which it is in your diary, you are near the end of vege growth.
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burnout
burnoutanswered grow question 6d ago
My guess would be magnesium deficiency. Are you adding calmag or Epsom salts to the water?
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