Phosphorous Deficiency/Remedy...

[Hal]

I have 2 plants that are showing what I believe is a phosphorous deficiency. I initially thought it was a nitrogen deficiency because I saw lower leaves turning yellow. I added some more nitrogen via Ferti-lome Fish Emulsion (5-1-1). Upon closer examination tonight, I observed more symptoms, and consulted Stitch's Cannabis Infirmary thread. I'm quite certain it is a phosphorous problem, not nitrogen.

I want to remedy this deficiency using some Jamaican Bat Guano (1-10-0), but am not sure the best way to deliver the phosphorous. I am watering from the bottom of the pot, so applying the guano into the top layer of soil won't work. I need to get the nutes into the water so it gets drawn up through the bottom.

Do I need to make an aerated tea to do this correctly?

Can I just let the guano soak in the water and shake it up a few times to put the phosphorous into solution?

Can one of the organic guru's help an organic newb navigate a slight bump in the path?

Thanks

 

[habeeb]

if the yellow leaves are burning up its P, if you have purpling stems it's P

guano, or something like nature's nectar P works fast, adding fine fine mesh rock phosphate will help now and for future. also adding to much P can harm..

no tea for guano to work. it will work once you add it to water, maybe people do it different but you don't need to make a tea for it to "work"

 

[Hal]

sounds like KISS to me, Habeeb. Are you confident about this?

Seems like I would have to at least soak it for a certain length of time to allow the phosphorous to leach out of the guano. How long would you soak it for? Would you give it an occasional shake during that time?

 

[CannaExists]

Last time I did a Peruvian Seabird Guano watering I just put the pellets into a cup of water and crushed/stirred them into the water with a spoon. Then I used the spoon to feed my 5 month old child. It took a good 20 minutes for me to crush them into the water (this was about 5 pellets in a cup of water) and even then they werent fully crushed. I say, let it soak for a good few hours and then attempt to crush it into the water. I've also heard of people using coffee grinders/ food processors to powder it. Doing these sort of things outdoors or with a dustmask on never hurt. One time I popped open my Seabird Guano bag and a plume of fume came out into my lungs and I felt a sort of weird high for an hour or so... yeh lesson learned.

 

[jaykush]

when i used to use guanos. i would just soak them in water overnight, strain and use that liquid. it works if you need a quick fix.

 

[southpaw]

Yep, run a half gallon of lukewarm water into a gallon container, put in a tsp of guano, shake it for a few minutes, then fill the rest of the container and let it sit for a day. Shake it again before you water.

 

[anthonytaurus]

Is foliar feeding out of the question in this situation?

 

[C21H30O2]

I feel like foliars are the best means to fix def. quick. I usually make a ACT with an addition of a small amount of guano or alfalfa meal (in the case of a veg mix). As its been said you can simply soak and then give it to the plant but I believe there is an added benefit with the addition of the microherd.

 

[Ninja420]

Jaykush- what are you using now?

 

[jaykush]

everything nature provides for free....compost, plant meals, rock powders, etc...

 

[Hal]

Thanks fellas. Looks like it will just take a short soaking to do the trick. Excellent.

I don't think my problem is advanced enough to bother with a foliar feed. The plants are about 20 days into their flowering, buds are still quite small, almost tiny. At what point is foliar feeding not recommended due to possibly creating moist conditions in the bud that might lead to fungus attack?

 

[CannaExists]

I don't think my problem is advanced enough to bother with a foliar feed. The plants are about 20 days into their flowering, buds are still quite small, almost tiny. At what point is foliar feeding not recommended due to possibly creating moist conditions in the bud that might lead to fungus attack?

I would mix common sense with a little risk-taking and experiment based on your own discretion. There's no solid science on how big da buds have to be to mold, "tiny" sounds like a little to no risk type of dealy to muah.

 

[ganja din]

hey

my 2cents

For a P deficiency, if you have a strong microherd, I would apply high quality hydrolyzed fish. That should help pretty quickly. Or to keep your grow organic (in the media) apply phosphoric acid as a foliar spray (if so try to get the room RH to ~>80% for 2-3 hour pre and 6-10 hours post foliar spray)

H.fish is a good option for full time P.

HTH

 

[habeeb]

^ that is true, fish has a good amount of P

but only if your not vegan / vegetarian..

 

[C21H30O2]

lets not forget that a ACT contains beneficial bacteria and fungi that will crowd out pathogenic micro life. So spraying your plants should not cause mold if you do so with a properly formulated tea. I spray my plants two weeks before harvest with no signs of mold. If you have even decent amounts of air circulation the plants will be dry in under 5 min.