Vote Now 🏆 for the Grow Awards 2025!
By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms
Accept
Is this Phosphorus deficiency ?
Gi773sstarted grow question 5 years ago
is this Phosphorus deficiency ? these symptoms started maybe 2 to 3 weeks after switching over to the Biobizz line .. what you guys think?
so now i started to add Biocanna's Bloom and Boost like i used in my prev 2 grows but it seems to continue ..
what you guys think?
likes
NobodysBudsanswered grow question 5 years ago
calculate out what you have been feeding it.... ppms from labels..
if P is 50+, probably not.
Any other method is just a guess at figuring this out. It look more like a K or P toxicity. i'd guess teh interveinal chlorosis and spots are a lockout of Mg.
could be wrong.. your labels and some math and recent behaviour (hopefully you have notes of how much and when you feed) will help you figure this out in a more precise way.
You are in bloom, so it's dangerous to give water-only... could hurt yield more than help.. i'd dial back a tad and see how it reacts... or, do the math and compare notes, i bet the answer will be obvious armed with that information.
don't know how? There's tones of how-tos out there
https://www.rollitup.org/t/understanding-and-calculating-nutrient-ppm.995409/
Gi773sanswered grow question 5 years ago
yeah actually it will prob be more from to much then to little .. ph and environment is always good , i have to admit that since making the biobizz food i get 1500 to 1800 ppm sometimes.. compared to Biocanna i got about 500 ppm less usual
Alrighty Then, i'll give plain water today as a mini flush and will reduce food to 1000 ppm from next feeding on
Thanks for your insight guys ;)
likes
Complain
Fruitgroweranswered grow question 5 years ago
Similar to what's happening to my bigdevil. I put it down to an overdose of pk boost, potentially locking out other bits like Calcium and magnesium. It could also be because of an incorrect ph. Or could be potassium defeciency, this is more likely if you haven't been feeding to heavily and can make the leaves yellow, dry and crisp.
1 like
Complain
Similar Grow Questions
Solved
hweixd
Day 4, after emerging. Is this coloration on the cotyledons okay?Humidity is 55 - 70, temp is around 20-24c, 50w full spec led
It's my first time, and i think i have been watering it too much
I also fed it 2-0-0 npk water with 4ml per liter and I since learned it's not okay. Will it recover? Is this too little grow for day 4?Leaves. Color - Yellow
Leaves. Color - Dark-brown
a year ago
4
2
Solved
GanjaGartenZwerg
Braune Blätter in BlütePflanzen bekommen braune Blätter gedüngt wird mit BioBizz auf Erde die pflanzen standen leider ein paar Tage zu nass ich hoffe ich habe kein fusarium drinnen pflanzen sind schon seit drei Tagen nicht mehr gegossen worden und immer noch nass was kann ich maLeaves. Color - Dark-brown
a year ago
2
7
Solved
ObserverInterest
What is causing this Leaf discolouration overnight after a lot of tent work yesterdaySpent a lot of time in the tent yesterday. Everything was fine and this morning there’s bad discolouration on the leaves of some plants.
I did lower the plant (was way too high) so may beight burn - but it’s only on some plants
I did make two mixes of water/nutesWeek 8
Leaves. Color - Dark-brown
a year ago
4
2
Solved
Majky1544
Deficiency? Help me...Hey guys im having a problem with my gorilla cookies auto.it's 8 weeks from seed, growing in plagron pebbles, drip system, EC now 1.8, PH 6-6.5. light viparspectra xs1500 pro, height approx 30 cm. Nutrients - advanced nutrientsLeaves. Color - Dark-purple
Leaves. Color - Dark-brown
a year ago
1
2
Solved
Mekster
Day 13 since flip. Spots on leaves.Going into week three flower. What are these?Week 7
Leaves. Color - Dark-brown
a year ago
2
Solved
Budz_Bunny
Brown Red Round Spots on 4-5 Fanleaves / fungus ?Hey folks, I have this issue with one of my ladies. There are small reddish-brown spots on 4-5 fan leaves, while the other plants don’t have anything. What could this be?
I think it’s a fungus, but I want to be sure and know exactly what it is before I start treating it.Leaves. Color - Dark-brown
a year ago
4
2
Solved
Hix57
Tache cuivrés sur feuille.Je me demande si les tâches cuivrées sur les feuilles de ma plante de cannabis et d'autres plantes sont dues à une carence en calcium ou en phosphore/potassium. Les feuilles affectées sont généralement les grandes feuilles, souvent nourricières. Voir agenda.
Je vous remercie 🙏🌱Week 5
Leaves. Color - Dark-brown
a year ago
5
3
Solved
IQuSX
Коричневый ствол и красные пятна Strain: NoNameОбнаружил очень странный ствол у растения, что с ним?
Был пересажен 5 недель назад из земли в кокос+перлит, при этом было удалено 80-90% предыдущей земли.Leaves. Too few
Leaves. Color - Red or pink
Leaves. Color - Dark-brown
10 months ago
1
Solved
Ramoset
Hello guys, what kind of problem could this planta have? These are autoflowering plants.Leaves. Tips - Burnt
Leaves. Color - Dark-brown
10 months ago
1
1
Solved
Babajipaz
Browning tipsHello everyone,
I'm in 3rd week of flowering and I'm starting to stop browning tips on newer leaves. Any idea what it could be?
Thanks!Leaves. Tips - Burnt
Leaves. Color - Dark-brown
9 months ago
2
2
Solved
IceeTea31
HelpWhat is the issue? do they need calmag or should i flush them?
if i should flush them what ph should this water have?Leaves. Tips - Burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
9 months ago
5
5
Solved
Jules216
Spots on leavesAny ideas why these Brown spots appeared so quickly?Leaves. Color - Dark-brown
9 months ago
3
Solved
Aleatoric
Possibly Potassium Deficient? Based on ALL the pics I could find, but not sure.I noticed these brown splotches and leaf edges on one area bud and pistils of my Orange Sherbet last night. Based on what I can find online, this might be potassium deficiency?
This is mostly on one spot near darkest edge when tent closed. Thanks!9 months ago
3
3
Solved
Galarihno
Leaves Curling Up & Brown SpotsThe leaves started curling upwards, turned brown about 2mm at the top and a lot of small brown spots appeared on the leaves.
I don't understand why or how...
Im using BioBizz nutrients, little less than recommended.
Watering every other day with 2L
PH 6.3
20°C - 24°CLeaves. Curl up
Leaves. Color - Dark-brown
9 months ago
1
2
Solved
Rhaerc
Leaves are gray/brown and curl down. HELP!Im a first time grower and I cannot figure what’s wrong. I’ve been feeding it Calmag and Grow from Biobizz since last week. 1 ml/l grow, 0,8ml/l calmag. PH of water + nutes is 6.3.
The soil is coco and pearlite.
Did I give it too many nutrients? Did I overwatater?Leaves. Curl down
Leaves. Color - Dark-brown
Setup. Strains - Photoperiod
9 months ago
3
3
Solved
ganzigunnu
this means?only deficiency showing now, started feeding only recently. why could have this happened?Week 7
Leaves. Color - Dark-brown
9 months ago
4
4