Plant health during flower, help please

philpas · Oct 24, 2025

Hi all-I am a first time grower and need some help. I understand that when the plants move to flower the energy starts moving to the buds not the plant vegetation. I am just concerned because at 5-6 weeks into flower my leaves are really starting to "yellow". Can someone give me some advice on what I should be doing or let me know that this is normal? These are 2 photo plants that vegged for 11-12 weeks and are about 6 weeks into flower. They are in 7 gallon fabric pots using Fox Farms soil. I only fertilize with Fox Farms liquid (now using the bloom fertilizer). Any help is really appreciated.

Smokey_LaFleur · Oct 24, 2025

Hard to tell from that pic, but i think you might have another issue to look at. Possibly powdery mildew. What are your grow room conditions? Temp, humidity, etc

philpas · Oct 24, 2025

Smokey_LaFleur said:
Hard to tell from that pic, but i think you might have another issue to look at. Possibly powdery mildew. What are your grow room conditions? Temp, humidity, etc

Temps is currently at 72-75 and humidity is about 55%. i can adjust. If it is a powdery mildew any suggestions?

Smokey_LaFleur · Oct 24, 2025

Environment seems in a good spot. If it is pm, there are several options, none of which I've tried as I've never had it. Hydrogen peroxide spray, milk spray, some kind of commercial product like lost coast. As for your original question... I'd guess nutrient burn. Are you feeding at recommended amounts?

TexasMade · Oct 24, 2025

We're you running a humidifier ?

philpas · Oct 24, 2025

Smokey_LaFleur said:
Environment seems in a good spot. If it is pm, there are several options, none of which I've tried as I've never had it. Hydrogen peroxide spray, milk spray, some kind of commercial product like lost coast. As for your original question... I'd guess nutrient burn. Are you feeding at recommended amounts?

Nutrient mix is a simple 3 teaspoons to a gallon with the Fox Farms Tiger Bloom 2/8/4. I will try and treat the plants with a mister/sprayer with baking soda and water- 1 tablespoon to a gallon of water. Hope for the best!!

ArtfulCodger · Oct 24, 2025

Looks like nute burn to me, too. Burned tips, running down the leaf edges. How often are you feeding?

JIMKSI64 · Oct 24, 2025

philpas said:
Nutrient mix is a simple 3 teaspoons to a gallon with the Fox Farms Tiger Bloom 2/8/4. I will try and treat the plants with a mister/sprayer with baking soda and water- 1 tablespoon to a gallon of water. Hope for the best!!

There it is.
It is recommended to keep supporting the nitrogen load with the grow onto mid flower. Check the feed chart. I do not know what FF you are using but a few of them have sledgehammer as a maintenance at certain weeks. This is mostly for newer folks who might miss a problem and when done properly does not more harm than an up pot.

Edit
And yaah wow PM.
Small reminder on pm. If you had your environment spot on and you still got PM a treatment is needed and folks have made suggestions but you need to find out where this came from.

philpas · Oct 24, 2025

TexasMade said:
We're you running a humidifier ?

I ran one in the very beginning of veg for a couple of weeks (until I saw a video that told me to stop). For the first two or three weeks of veg the humidity may have been around 70%

philpas · Oct 24, 2025

ArtfulCodger said:
Looks like nute burn to me, too. Burned tips, running down the leaf edges. How often are you feeding?

The plant probably get about a quart of water a day each. the mix is three teaspoons to a gallon. It has been in all the water since flower. i didn't really give nay nutrients during veg because I was using Fox Farms soil and supposedly didn't need any more fertilizer etc.

ArtfulCodger · Oct 24, 2025

philpas said:
The plant probably get about a quart of water a day each. the mix is three teaspoons to a gallon. It has been in all the water since flower. i didn't really give nay nutrients during veg because I was using Fox Farms soil and supposedly didn't need any more fertilizer etc.

Tough to say without some measurements, but just for comparison: when I run FF soils, I might feed three times total over the course of veg and flower. Maybe four, for longer running varieties.

philpas · Oct 24, 2025

ArtfulCodger said:
Tough to say without some measurements, but just for comparison: when I run FF soils, I might feed three times total over the course of veg and flower. Maybe four, for longer running varieties.

So-to the point...no more fertilizer in flower. Is that correct?

Robgrows · Oct 24, 2025

JIMKS164 is right about the nitrogen. Big Bloom is used throughout flower. Grow Big stops in week 6. Cal/mag stops week 6.

Did you use any of the above before week 6 because they are meant to work together.

3 tsp per gallon of Tiger Bloom is 50% too much per the feed chart and recommended every other water.

If this is an 8/9 week flower I would finish with just water.

Good luck and let us know how it works out.

philpas · Oct 24, 2025

Robgrows said:
JIMKS164 is right about the nitrogen. Big Bloom is used throughout flower. Grow Big stops in week 6. Cal/mag stops week 6.

Did you use any of the above before week 6 because they are meant to work together.

3 tsp per gallon of Tiger Bloom is 50% too much per the feed chart and recommended every other water.

If this is an 8/9 week flower I would finish with just water.

Good luck and let us know how it works out.

I didn't use anything in veg. just Tiger Bloom since flower. teh only thing (other than water) was the nutrients that come in The Fox Farms Ocean Forest soil

Week4Bytch · Oct 24, 2025

philpas said:
I didn't use anything in veg. just Tiger Bloom since flower. teh only thing (other than water) was the nutrients that come in The Fox Farms Ocean Forest soil

If you could check the soils pH it would tell you where your at as far as toxicity or hunger problems.

ArtfulCodger · Oct 24, 2025

philpas said:
So-to the point...no more fertilizer in flower. Is that correct?

Based on the dark leaf color and burned tips/edges, my guess is yes. If they were mine, I'd check the EC of the runoff to be sure, but if you're only giving a quart at a time, there probably isn't any. For what it's worth, I've found Ocean Forest and Happy Frog to do better with less frequent, higher volume waterings.

Ninjadogma · Oct 24, 2025

You managed to get a pretty good plant growing there... not bad for a first timer. First thought was wondering if you had been misting that plant or something. I see the WPM spots people are talking about but from resolution I can't tell if thrip damage or the dreaded white fuzz. Folks are gonna cringe at this but if it could be thrips or it could be WPM and you're not sure, hit it with some Neem and you're good. Just don't drench the buds in it because there's a lot of folks who assert it will affect taste and smell of final product. There's times I had to whip it out against unrelenting mites and I haven't noticed anything negative before.

Some other things... Plant looks overfed and not under based on the browning edges. And something else, I see them brown spots and from the pics I can't tell if that could be the onset of calcium deficiency from a nosediving pH environment or, suce there's also potentially WPM going on, if you might also have some leaf septoria setting in.

So course of action, you want to hit your plant good with an anti-fungal and also check the pH at the bottom to make sure it's not sitting below 5.8 and blocking cal/mag uptake. If you have an EC pen it might also be worth a look to make sure it's staying below 3. If necessary, you can bring both those numbers down with a little extra tap water through the pot but it doesn't take a ton and should be done in small increments as you watch the numbers so you're not stripping the good stuff out with the bad.

philpas · Oct 24, 2025

Ninjadogma said:
You managed to get a pretty good plant growing there... not bad for a first timer. First thought was wondering if you had been misting that plant or something. I see the WPM spots people are talking about but from resolution I can't tell if thrip damage or the dreaded white fuzz. Folks are gonna cringe at this but if it could be thrips or it could be WPM and you're not sure, hit it with some Neem and you're good. Just don't drench the buds in it because there's a lot of folks who assert it will affect taste and smell of final product. There's times I had to whip it out against unrelenting mites and I haven't noticed anything negative before.

Some other things... Plant looks overfed and not under based on the browning edges. And something else, I see them brown spots and from the pics I can't tell if that could be the onset of calcium deficiency from a nosediving pH environment or, suce there's also potentially WPM going on, if you might also have some leaf septoria setting in.

So course of action, you want to hit your plant good with an anti-fungal and also check the pH at the bottom to make sure it's not sitting below 5.8 and blocking cal/mag uptake. If you have an EC pen it might also be worth a look to make sure it's staying below 3. If necessary, you can bring both those numbers down with a little extra tap water through the pot but it doesn't take a ton and should be done in small increments as you watch the numbers so you're not stripping the good stuff out with the bad.

Thank so much-sorry to sound ignorant but I don't know what WPM is or thrip...can you clarify?

Ninjadogma · Oct 24, 2025

philpas said:
Thank so much-sorry to sound ignorant but I don't know what WPM is or thrip...can you clarify?

WPM is white powdery mildew It shows up as a white film or fuzz on your plant. Thrips are bugs that leave little white hash marks on your leaves from where they ate.

Sunasun · Oct 26, 2025

Nutrient toxicity from improper watering habits. You've managed to over water and underwater causing a toxic buildup on the top third of your medium. Water all of the medium, then allow it to dry back for a few days or weeks based on the size of the root structure. You're drowning your roots which is causing the problems you are seeing topside. Start watering correctly, then watch for the new growth to look healthy. Good luck.

Plant health during flower, help please

Plant health during flower, help please

philpas

Smokey_LaFleur

philpas

Smokey_LaFleur

TexasMade

philpas

ArtfulCodger

JIMKSI64

philpas

philpas

ArtfulCodger

philpas

Robgrows

philpas

Week4Bytch

Loyal To The Soil

ArtfulCodger

Ninjadogma

philpas

Ninjadogma

Sunasun

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