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Trying to rebalance my plants from a potassium lock out. Coco has been ph flushed. What next, any recommendations. Pictures with progression below
Greenatgrowingstarted grow question a month ago
This is potassium lock out/deficiency. I have been trying to identify for about 2 weeks. First Iadded plant magic bloom and flooded plants . Problem persisted. Nute lock?=flush. Plant is worse. Perhaps too much calmag . I have panicked and added a small top up feed. Any fix’s?
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Ultravioletanswered grow question a month ago
Extreme moisture or compaction decreases the level of oxygen in the soil, can cause a potassium deficiency.
Potassium lockout can cause the edges and tips of the leaves to turn yellow or brown and may also cause the leaves to curl. This is due to potassium's contribution to cell wall strength and disease resistance. Calcium lockout can result in distorted new growth and brown or black spots on the leaves.
Applying too much calcium and magnesium can cause a potassium deficiency; the K/Ca and K/Mg ratio should always be kept above 2 (but below 10, since too much K can hinder the absorption of calcium and magnesium).
Each nutrient has a mobility within the plant, mobile or immobile.
Each nutrient has a mobile within the soil, this can differ from mobility in plant. When you flush its very easy to flush mobile nutrients away leaving abundance of immobile.
Nitrogen & phosphorus especially. Phosphorous because it is extremely mobile in soil. Nitrogen because there are different types. Nitrates are highly mobile, while ammoniacal nitrogen is immobile. If ammoniacal nitrogen rises above 30% your in trouble.
Morale of story don't flush.
Hope it works out for you.
Just a guess.
Scrubbyjimbobanswered grow question 25 days ago
Everyone always jumps to deficiency/lockout when you should ALWAYS double check pH values first. More often than not, pH is the issue.
Ca deficiency shows up more as brown speckling, not so much along the edges. Potassium can show up at the tops though it's more typical lower down. Still it's more often a pH issue than lack of nutrition when you're not using living soils.
Other issues that can create the appearance of lockout/deficiency:
Over/under watering
High humidity levels
Dry zones within the media
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Moxi57answered grow question a month ago
homies right, this is late calcium deficiency
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Ninjabudsanswered grow question a month ago
Hey there
I'd 1st check run off what's pg level and see if you soil ph is off causing the lockout it's common that soils come with to much acis in them. Also if you worried you gave to much nutes. I'd wait about a week and see hiw the plants are doing. You can always get away with less nutes than to many. Also remember light, environment like humidity and temp and gentics affect growth more than extreme amounts of nutrients. It's always better to go with the little side with nutes and slowly increasing amounts
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Organomananswered grow question a month ago
This is not a potassium deficiency, it is primarily a calcium deficiency with an excess of nitrogen as well.
Do not flush, this will solve nothing.
Reduce your nutrients and increase your cal/mag slightly.
Damaged leaves will not recover, but you can stop the symptoms from getting worse.
In two weeks time, new growth should be symptom free.........if not, up the dosage of cal/mag again.
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