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 QuestionsHello guys...iv noticed today on one of my GSC the...

Hello guys...iv noticed today on one of my GSC the...

HappyGrower420started grow question 6 years ago

Hello guys...iv noticed today on one of my GSC these spots . She was growing so fast and suddenly i see this today. I topdress it 1 week ago with guanokalong guano . What do you think is this ?

Solved

Leaves. Edges burnt

likes

CRiSPrGrowanswered grow question 6 years ago

Hey HappyGrower, you have two different things happening actually ! when the tips are burnt, that's nutrient burn from the strong guano. People under estimate how strong the bat guano is, i've seen many people have this problem. Just because it's bio doesnt mean it's not strong ! Second problem is magnesium deficiency from the flower stretch. During the flower stretch the plant needs more micro so it cannabalises itself. the yellowing between the veins and the side of the leaf is the clear sign of magnesium deficiency. Try adding cal mag to the feed and use it as a spray 2 ml / L ... the problem should stop spreading within 10 to 14 days. Hope this helps ! 🚀

1 like

Complain

Selected By The Grower

Similar Grow Questions

Solved

Suddenly, massive problems. Tried a lot already, nothing helped yet. Any ideas what I'm missing?Hey guys, I've been growing for a few years now and something like this has never happened to me. Long story short, as soon as I move my plants from the veggie box into the flower box, they slowly start showing these symptoms (see pictures). The box worked fine for several grows

Leaves. Edges burnt

Leaves. Tips - Burnt

Leaves. Color - Yellow

10 months ago

7

3

Solved

What is that?Yesterday evening feed 0.5 litre EC 1400 pH 5.9. Runoff was EC 900 pH5.6 Increased light intensity to PPFD 600. This morning larger upper leaves are in "praying" position, one leaf closer to bottom looks sick. If it's a light burn, why not on upper leaves?

Leaves. Edges burnt

Setup. Strain - Autoflowering

a year ago

1

Solved

Partially Dry leaves in grow phase Hello there, What's wrong with my leaves, I have a few ones in my box, I m in Coco and in grow phase

Leaves. Edges burnt

Leaves. Curl up

Leaves. Twisted

a year ago

2

2

Solved

To leafs are starting to get some yellow areas and dry, i dont know what is this and im trying to solve it, somebody know what could this be?

Leaves. Edges burnt

Leaves. Color - Yellow

a year ago

13

3

Solved

Tox/def Nutrient burn ? Light stress?

Leaves. Edges burnt

Leaves. Color - Yellow

a year ago

1

Solved

What is she telling me?Anyone know what she’s going through? Four weeks old, using tap water with hydroguard and GH FloraTrio nutrients. PH seems to go up from around 5.6 to 6.1 in a matter of hours. Ppm=635 EC=1.2 right now. Been going very easy on nutes, about half strength still. Could that be it?

Leaves. Edges burnt

Leaves. Curl up

a year ago

2

4

Solved

SuperGreenGoblin

Curl and clawing,N-Toxicity?Flushing?Hello Growers! Last week I gave around 1ml/L BioGrow in 600ml water. Now all leaves seem to me dark green. Some are disformed/wavey and show burned leave edges and slighty burned Tipps. Two of them seem to be handling the high nitrogen. But the third is curling/clawing. Wdyt?

Leaves. Edges burnt

Leaves. Tips - Burnt

Leaves. Curl down

10 months ago

11

4

Solved

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!

Leaves. Edges burnt

Leaves. Tips - Burnt

Leaves. Color - Dark-brown

10 months ago

3

3

Solved

Grower question Any ideas what the issue could be? Few weeks into flower. Dealing with fungus gnats and have kept the population very low. Temps do get high, at most 95 (hot I know). I cranked down the lights to their lowest setting (100 true watts LED). I have adequate air flow.

Leaves. Edges burnt

Leaves. Color - Pale

10 months ago

4

Solved

Please help to identify deficiency / excess???7 weeks, autoflower, soil + perlite, giving water with RQS Easy Bloom (half a tablet per 3 liters), pH of the watering mixture is 6.5. The bottom leaves on one of the plants are turning yellow (starting from the tips) and slowly dying , while the top leaves tips look very burnt.

Leaves. Edges burnt

Leaves. Tips - Burnt

Leaves. Color - Yellow

10 months ago

9

3

Solved

Camarao_Desperto

Yellow leaves, first ones of the plant Sup guys, any tips? They are getting yellow, leaves of the 2 node, and looks like the ones of the 3 node are becoming too, happened with my four girls

Leaves. Edges burnt

Leaves. Color - Yellow

10 months ago

3

5

Solved

Yellowing edges and brown tips in 7 week of flower.Hello, fellow growers. Need some help. I'm in 7th week of flowering and upper leaves start yellow with burnt edges. The lamp was too close(30 cm) for 3 days. I raised it to 50 cm ten days ago, but the symptoms are stil progressing. Is it light burn or potassium deficiency?

Leaves. Edges burnt

a year ago

3

1

Solved

Nitrogen overdose?We have 2-3 weeks may be, or less. Its the problem?

Buds. Other

Leaves. Edges burnt

Leaves. Color - Yellow

a year ago

1

1

Solved

we have this Gelato 33 plants on their 1st weed of planting on 40L Pots, it looks like yhe plants are stressing by my Point of View , the temp in the room is 29° and night 16°. They have been 1 week 24h light schedule and now we just made it 18/6h . Would need some help on it.

Leaves. Edges burnt

Leaves. Curl up

Leaves. Color - Yellow

a year ago

2

2

Solved

Burn leaves, heat stress Could anybody suggest me anything to do to this girl? I was mixing her indoor and outdoor but it's been so hot that she was hit by heat stress.. PH soil around 6.3 and keeping. Suggestion would be very welcome. Thanks in advance, guys!

Leaves. Edges burnt

8 months ago

8

6

Solved

Dry and curling, when flush?Hey there - it’s my first grow ever (Gorilla Zkittles Auto), and I’m guessing I’m in flower week 7. my leave are going slightly dry and curling all over the place. Is this normal or did something go sideways… Also, how long until I should start to flush? Thanks for any help…

Leaves. Edges burnt

Leaves. Curl down

8 months ago

2

2

Solved

White Widow Automatic in soil Watering every 3-4 days with about 1.75 liters, Drainoff Ph 6.8 Once a week feeding biobizz fertilizer, about 1/3 of the recommended amount. Grow, Bloom, TopMax, Active Vera, Bio Heaven. Since 1 week CalMg 0,5 ml/l It started 1 day ago, after watering and feeding. Thanks

Leaves. Edges burnt

Leaves. Color - Yellow

8 months ago

1

1

Solved

Nute burn?Is this nute burn or something else? Growing in 5 gallon fabrics pots with soil / the bottom has super soil. Plants are 100 days old.

Leaves. Edges burnt

9 months ago

3

Solved

Leaves burned after spraying a cocktail To repel aphids I sprayed garlic infused in alcohol with water, already did this few times without side effects. But this time I added several drops of tea tree essential oil. Is it possible that the essential oil has burned the leaves so much or is this some nutrient deficiency?

Leaves. Edges burnt

Leaves. Tips - Burnt

8 months ago

3

4

Solved

Bio Grow burn vs Bio Grow boost Hi, it seems like she keeps getting nute burns as soon as i give her Bio Grow, even at half dosage (1ml/L). She has only 10 more days of veg and i wanted to boost her, what if i stop giving Bio Grow altogether until flowering? Is the tradeoff worth it? No burn but less growing?

Leaves. Edges burnt

8 months ago

1

1