Learn To Spot Phosphorus Deficiency In Cannabis
Learn To Spot Phosphorus Deficiency In Cannabis
Today on Lex’s World I give you guys pointers on Phosphorus deficiency, also known as P-deficiency. If you are in flowering, are seeing purple stems and beginning to see black blotches on your lower leaves, this is probably the video for you.
My Grower Gear & Head Shop, where you can also find the Cannabis Encyclopedia: https://www.amazon.com/shop/influencer-945853a8
Facebook: http://www.facebook.com/lexsworld
Twitter: http://www.twitter.com/lexsworld
Insta: http://www.instagram.com/lex_blazer
Odysee: https://odysee.com/$/invite/@Lex_Blazer:b
Need my help 1-on-1? See my Club for info: https://www.patreon.com/Lexsworld
PK Plant Booster: http://amzn.to/2m91SHi (amazon affiliate)
My old episode on N-deficiency: https://www.bitchute.com/video/XekIMsiVJg5o/
My old episode on Mg deficiency: https://www.bitchute.com/video/Mt4nRRpYaZ24/
My off-topic channel Lex’s Lounge: https://www.youtube.com/channel/UCMPEP9IYkN0AVBf0SJd-3iQ
I think y meant raise you PH so it can take up mor P?
your the best
fuck shit what if it starts at the top
Hi Lex Blazer, I am a noob and I have similar looking problem with the leaves I have a pH of 6 to 6.5 and when I water through soil and it drains out the pot the water drained tests at pH 5. Should I increase my water pH or is this normal?
So can you check soil ph the same way as hydro ph?
I like that deficiencies chart where can I buy it at..🙏
Thanks for sharing
Thank you 🙏🏻
Tips on Germany plesse
My friends greenhouse gets cold at night with no heater inside, she never has any problems, strange.
Alot of phosphorus deficiencies come about because the ph of the soil becomes acidic after time.
Example last grow I was putting in nutes at ph of 6.4 and it was coming out at 5.2 .
Check your ph people in a slurry test often.
You hit the nail on the head. You described my problem perfectly and your pictures are accurate. Everyone I asked for help told me it was cal mag deficiency.
Thanks for your help!
Looks just like magnesium deficiency.
How do i drop the PH of soil? Do I just water the soil with PH balanced water?
Hey I just started growing my plant I’m now 3 months in and I’m getting all these signs but I’m in veg stage I have all those dark spots on my lower leaves the stems are also purple but I have a bloom and grow fertilizer my house stays at about 73 degrees it’s been growing well I had some yellowing early in the process but when I just gave my plant water it seemed to nurse itself back to health I dont know if I should keep giving it the grow fertilizer ever 2 weeks or should I stop and just water it normally please help I’m very new to growing btw I did a quarter if a teaspoon of grow fertilizer to a gallon of water is that not enough or should I do more I know in the video he said purple stems could also mean jnderfeeding I’m using miracle grow soil yellow bag because I couldn’t afford anything else PLEASE HELP
my plant is rusty but its only happening near the top i had low ph (5) now im up to 7
The image at 3:08 threw me off compared to what you’re saying at the time. You said you pH (in hydro or soil) is probably too *high*. But the diagram for hydro shows that Phosphorus is available from 5.8 *up* to 6.1. And that Phosphorus isn’t available at all below 5.8… So I’m a little confused.
Could you clarify on this please? There’s so many of those nutrient availability charts too.
Thanks.
Thanks man! Good video. I’m dealing with it rn. It’s not too bad if you catch it, they recover nicely. Appreciate the information. 💪👍
Thanks Lex
What about any dry amendments Can you recommend any dry amendments growing organic soil it’s figured I ask you know what I can add for that
thanks Lex
This was a major score for me watching this video. I’m a beginner grower with only 3 successful harvests (all 3 have been magnificent and produced a better product than I was use to buying for years). With all 3 grows, I haven’t had any major problems except for a few leaves turning yellow, hear and there, and my stems turning slightly purple. It was like clockwork with all 3 grows when the problems starting occurring (yellowing leaves about the 2nd to 3rd week of flowering) and all 3 grows were different strains/types of pheno’s. I used the same feeding schedule for all my grows so the yellowing leaves (like clockwork) is something I’m doing wrong with feeding/watering. I originally thought the purple stems were just part of the plants natural color, but by watching this video I’m learning the yellow leaves combined with purple stems is a phosphorus deficiency. It makes perfect sense because I’m using Advanced Nutrients as my basic nutrient line (Micro, Grow, and Bloom) and in my opinion, Advanced Nutrients could have bumped up the phosphorus in the bloom bottle. I bought some NPK Raw phosphorus to supplement so I hope it corrects my issue. Thanks for all the info Lex B. I learn so much from you bro.
Thank you bro, your videos are awesome
you’re the best, I’ve seen lots of channels, lots of videos, I follow many people in IG, but you, my friend, are the one who shares clear and accurate info the most
Why the leaf is shining but other planet like matt
How do you treat these deficiencies when your water run off is through the roof? Flush with plain water or flush with low nutes?
Awesome video!
This the best channel on here just gotta turn the speed up to 1.25x
Is it possible for mobile deficiencys to start at the top of the plant ?
Thanks for adding in that tid bit about night temps being a bit low can show up as the same symptoms. bc I was swearing up an down I for some reason had phosphorus deficiency in veg, even knowing it’s pretty rare but all signs said I did. Took me a few threads, other videos before seeing this one to figure out I was letting my room drop to low at night smh lol. Anyways appreciate the info. Not to mention ya save me alot of time an wasted effort man. Lol ✌🤙
Interesting so whats too low of a temp for vegetative growth?
The best part is those leafs are not phosphorus deficient.
Do the red stems disappear when you start feeding phosphorus?And if they do,how long does it take from the moment you add the right amount of it?
I am in veg stage atm, and it is looking like phosphorous…. but I’m thinking it could be mainly caused by the fungus nats…. they got bad for a little while, but then I got some insecticide soap, which has been working decently… atleast there aren’t as many flying around, but they are still in the soil alot…. the leaves are turning into a pale yellow, and then getting really distinguished spots, like black almost looking like freckles.
Growth has slowed tremendously and a few places I topped the plant, it dried up the sap and nothing grew out of where I cut it…. although I am still noticing new growth, but the leaves are all smaller and it doesn’t seem to be growing much vertically anymore.
The affected leaves are mainly older leaves, but even some newer leaves are showing signs, but not nearly as much… also the edges of the leaves are fraying and drying up as well.
Not sure if my explanation was good enough, but I will also try to post a few pics. Hopefully we can get it figured out before I have to throw them all out… I’ve already thrown out a few younger plants that got too infected.
I’ve got tiny yellow spots on leaves, any suggestion I don’t really think it’s leaf sephoria
Thanks
thx for sharing knowledge!
Yooooooo your explanations are just perfection 🤯
Wow, Phosphorus was not what I was thinking but this is video s pretty much describing my plants issues. I thoght it was a Nitrogen toxicity just as you said but the rusting, browning/purpling on stems, etc are spot on. Will update once remedied…Thank you!!
Hi friend still active? I’d like your help with diagnosing :/
Lex , what would cause something that looks like that but deformed only half the leaf on 30 % of leafs and looks mobile
I know I’m a little late to the party but thanks for that I appreciate it
there will be no drugs in 200 years & the universe will completely run out of all chemical elements & all chemical compounds needed to make and manufacture drugs Look up phosphate deficent cannabis it does not look good We will not be able to manufacture make & create drugs without chemical elements & chemical compounds that are needed to make create and manufacture drugs also the most needed elements required for manufacturing drugs are phosphate potassium and sulfur and all of those are expected to run out completely in 200 years so in 200 years there will not be any drugs because we need sulfur phosphate and potassium to manufacture grow create and make all drugs all drugs are made by chemicals and when chemicals run out so will all of the drugs. Cannabis will not survive the upcoming phosphorus crisis!!!
& it’s that simple………., says the smart man 🤯
4 years old but new to me great video
Thanks !
5 years later your still helping lex thank you
I’m 3 weeks into veg in promix and have fed very little nutrient containing P to them and the dark leaves and dark almost mold looking spots appeared recently ( passed 48hr ).. is what has me believing I have a P deficiency.
Man Lex your awesome!!! I have this same thing going on with one of my plants right now that’s about halfway through its flowering cycle and didnt know why some of my leaves were starting to show these exact signs! Everything makes sense as to what shes been fed up until this point and points directly to a phosphorous deficiency! So I’m going to hit her with some fox farm Tigerbloom which is a 2-8-4 and should hopefully take care of the problem! 👍🙏! Fingers crossed!! Thanks alot for dropping some knowledge on this topic as it was exactly what I needed right now!!! Happy growing man!!✌
thats why im subscribed .