Vote Now 🏆 for the Grow Awards 2025!

Chat

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

Recommended

Grow QuestionsPhosphorus deficiency?

Phosphorus deficiency?

GreenieJuicestarted grow question 4 years ago

Is this a phosphorus deficiency? I've upped the feed a week ago but it's not improving yet.

GreenieJuice

Open

Leaves. Color - Dark-brown

Leaves. Color - Mottling

likes

Answer

sir_isOanswered grow question 4 years ago

I also reckon that's calcium. Something to consider, most calmag supplements are biased to the magnesium side (typically around 2 to 4:1 calcium vs magnesium, which is often a bit high for magnesium, but situational).

likes

Complain

GreenieJuiceanswered grow question 4 years ago

Thanks for all your answers, I've ordered some calmag :)

likes

Complain

Fruitgroweranswered grow question 4 years ago

That's calcium or wind damge my friend

1 like

Complain

TheUk420Showanswered grow question 4 years ago

I agree with organic defo cal mag issue here my friend peace out :)

1 like

Complain

OrganicNature420answered grow question 4 years ago

Calcium problem mate I would say. Up your calmag 1ml 1lt or use 0.4 as a base for you feeds. Do not flush if in coco the soil needs nutrients and you will not help it 👍🏻 feed twice a day with run off until problem sorted 👍🏻❤️🌱🍁 happy growing

3 likes

Complain

Similar Grow Questions

Solved

Calcium issues?Is this the start of a calcium deficiency? Aside from these couple of spots the plant looks healthy, but I really don't want this to progress. I can't measure my PH for a couple of days, sadly, until I get the equip through the post to do so.

Leaves. Color - Mottling

4 years ago

3

Solved

Is this a ph problem Hi my plants have these spotting on them I think ot has to do with the ph would just like second opinion

Leaves. Color - Mottling

4 years ago

2

2

Solved

Leafs with brown spots???I have one plant that has a couple leaves with brown spots. Thoughts?

Leaves. Color - Dark-brown

4 years ago

1

1

Solved

What deficiency is this?This green gelato autos fan leaves are starting to turn brown and curl upwards. Is this a nute deficiency or what’s going on? Thanks!

Leaves. Curl up

Leaves. Color - Dark-brown

Leaves. Other

4 years ago

1

8

Solved

IDEAS?! double cookies auto BSF Tuve exceso de N al comienzo de la floración, hice lavado de raíces y todo empeoró! ahora, a casi 1 o 2 semanas de finalizar la floración,ella se encuentra así.Luego del lavado de raíces, continue con fertilizantes normalmente igual que las otras y las otras están en buen estado!

Leaves. Color - Yellow

Leaves. Color - Dark-brown

Plant. Stem - Red or purple

4 years ago

6

Solved

brown spots on leaves Got some brown spots on random leaves for about 1 1/2 veck ( Only smallest girl ) it seems not to spread to the others. what is it? 😪😪 Peace

Leaves. Color - Dark-brown

4 years ago

1

1

Solved

Leaf issues with 3 Pineapple Express Autos - is it burn or deficiency?All 3 plants are having issues to the lower leaves. They are dried and brown blotches, brown edges of the leaves, leaves drooping off and curling down and brown. They switched to Canna Terra Flora two weeks ago - is this a over feed or deficiency?

Leaves. Edges burnt

Leaves. Curl down

Leaves. Color - Dark-brown

4 years ago

2

2

Solved

Leaves turn brown all of a sudden What could these brown parts mean? They show up randomly, also on lower leaves, so couldn’t be the light being too close? Thanks!

Leaves. Color - Dark-brown

4 years ago

1

3

Solved

Leaves problems Hi friends, could this be lack of Calcium or some sort of fungi or xxx? Only 2 leaves on 1 plant affected...

Leaves. Color - Dark-brown

4 years ago

2

1

Solved

Brown spots and patches I got some spots that look like cal-mag deficiency on 3/8 of my plants. I put some pics up that say "cal mag issue?" for reference. Not sure what this is especially when the others are looking happy. Let me know your thoughts <3

Leaves. Color - Mottling

4 years ago

2

2

Solved

Are these blotches calmag deficiency?

Leaves. Color - Mottling

4 years ago

1

1

Solved

Brown leaves - what am I doing wrong, folks?They look yellow in the photo, under 250W of blue light, but they are brown. This starts at the tips of the large lower leaves and spreads quickly to the whole leaf. Also modest edge curl. What am I doing wrong here, folks?

Leaves. Curl up

Leaves. Color - Dark-brown

Leaves. Color - Mottling

4 years ago

3

3

Solved

Hi guys. Have a problem with my Ladies. First two photos are from one box and two seconds from another. I think that the problem is same on both. Deficiency ? What could it be ?

Leaves. Color - Dark-brown

4 years ago

3

Solved

Wilting leaves and copper spots? Save Me!These copper spots started appearing around 2021-01-28, and the wilting leaves started 2021-01-29. The newest additions to the environment were the much stronger MarsHydro 300w light. I've had to water more often because it dries out pretty quick with the rampant heat. what next?

Leaves. Wilting

Leaves. Color - Yellow

Leaves. Color - Mottling

4 years ago

5

8

Solved

Continuing calmag deficiency What I think is a calmag deficiency started about 10 days ago. At first I thought it was too low PH (6.0 - 6.1), so I corrected that, but no luck. Then I started adding biobizz calmag, still no luck. It seems that the deficiencies are picking up speed again. Any ideas appreciated

Leaves. Veins - yellow between

Leaves. Color - Dark-brown

Feeding. Deficiences

4 years ago

2

4

Solved

Seedlings leafs My seedling is 2 weeks old, used fox farm chart amd used 6 tbsp per galon to make solution, watered 3 plants only 1 is showing this symptoms please advise.

Leaves. Color - Dark-brown

4 years ago

1

1

Solved

Nutrient burn How can I fix a nutrient burn on a seedling?

Leaves. Color - Dark-brown

4 years ago

1

1

Solved

Foglie Ho un problema alle foglie sapete cosa sia? Ho provato ad alzare i led a 50cm per vedere se sia quello il problema. Voi cosa dite?

Leaves. Edges burnt

Leaves. Color - Dark-brown

4 years ago

2

3

Solved

Happy_Rakosnicek

Leaves. Color - Dark-brown

4 years ago

1

1

Solved

Phosphorus def in veg?Phosphorus deficiency in wk 4 of veg? I noticed a few small discolored blotches on lower leaves 2 days ago and today it is a lot worse! Use flora trio, and 2 other plants in this run are under same conditions with same nutes. Could this be a pH issue? PH has been consistently ~6.

Leaves. Curl up

Leaves. Twisted

Leaves. Color - Dark-brown

4 years ago

1

2