Please help me identify this problem.

[blue...yum]

I have looked over the many plant photos on sickness and disease but I want as many opinions as possible before I try fixing the problem. I have 4 plants growing 1 is Big Bang 1 is mazar x white rhino and then other two I was told was a mango strain but I don't know for sure what type of strain it is exactly. Anyway the two "mango" plants are growing very tall and not bushy. They must be some type of auto flower as one is budding already on its own. Both "mango" plants seem to react differently to being fed the nutes and every time the leaves get a washed out look. For the last two days 1 of the mango plants just isn't bouncing back right. I haven't fed nuts in a week so I know it's not a reaction to a specific feeding. If anyone can please help me find a solution to this plants that would be great.

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[az2000]

You'll have to post a photo under natural light.

What soil and food do you use? Did you switch to a "bloom" formula?

 

[Joe Blows Trees]

The curling up of the leaves is a symptom of heat stress. As for feeding the mango's, adjust it to what each plant is comfortable with when you start feeding them again. Without pictures as stated above, it's a crap shoot attempting to figure out the problem.

 

[blue...yum]

Sorry bout the photos, I will post a few more, I can't get natural lighting because they are large and in a tent. Also the temperature is always steady at 75 and the light is kept high so I don't see why that plant would have heat stress and none of my other plants do. They are in 3 gallon sacks in fox farms soil. I feed them jungle juice typically once a week and they get regular waterings roughly every other day depending on how dry they are. I have two lights one is a hps then other is a t5. The temp is always kept at 75 and humidity is usually between 35-45% and around 70% right after watering. Here are some other pics. The sick plant is always in the left back corner.

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[blue...yum]

In the second pic you can see a part of all 4 plants. The front left plant is Big Bang, front right is a "mango" strain, back right is a re veged mazar x white rhino, and the sick back left plant is another mango. If you look at the front right "mango" you can see how it is tall and not bushy at all but is already starting to bud.


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[az2000]

A circulatory fan blowing too much air can cause leaves to stress.

 

[blue...yum]

There is not a ton of air blowing through the tent. The plants don't move, if you look at the bottom pic the fan is faced up towards the light and wall on tent. It is not blowing air on top of plants. It is also set on low. I also have a high velocity fan on top of tent that is pulling air out and two small fans that move air at the bottom and top back corner of tent. There is not enough air flow to make the leaves move.


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[az2000]

They don't have to move. The dryer the air, the more stress can occur just from too much air circulating.

I would turn it down, or put it on a timer to come on ever 5 minutes. Just to see if that makes a difference. Or, hang a wet towel in your tent. Your humidity's a little on the low side. Nothing terrible like my 20%.

 

[blue...yum]

My current humidity is 65. I thought it was suppose to be around 40% when flowering. But does it have to be above 65%.


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[az2000]

My current humidity is 65. I thought it was suppose to be around 40% when flowering. But does it have to be above 65%.

I went by this: "humidity is usually between 35-45%"

 

[blue...yum]

Ahh yea when the plants are dry it's around 35-45% But once watered it gets a good increase for about a day or so then it's decreases again until next watering


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[blue...yum]

Hope this close up helps


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[whitebb2727]

Hope this close up helps


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Quit feeding so heavy. Quit watering so much.

You need to let the soil dry a little. As it dries the pH swings. That swing allows proper nutrient uptake as not all macros and micros absobre best at the same pH.
Also you will notice humidity drop as soil dries.
I run t5., you need to keep a t5 withing a foot from the plant.
I have 432 watts in a 2x4 and the sweet spot is about 8-10 inches.

It will keep plants shorter so they don't out grow your space

The the short ones have to much nitrogen that is the reason for the twisting in the leaves and the yellow if from over watering.

The tall ones look good except they haven't stretched. They will double in size. Also a little dark green. Back off the N a little.

Make adjustments and you will see improvement.

 

[blue...yum]

I have maintained this same feeding and water schedule through 2 grows. I feed the amount directed nothing more and I never water them until I can lift them with ease from being dry. The plants were just watered last night and the back left plant was already droopy so I do not think overwatering is an issue. Nutes may be to strong though which is why I haven't fed in a week


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[whitebb2727]

I have maintained this same feeding and water schedule through 2 grows. I feed the amount directed nothing more and I never water them until I can lift them with ease from being dry. The plants were just watered last night and the back left plant was already droopy so I do not think overwatering is an issue. Nutes may be to strong though which is why I haven't fed in a week


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Strains are different.

Go ahead and keep doing what your doing. Its working great.

Make adjustments and you will see improvement.
Stay the course and they will get worse.

 

[whitebb2727]

Nutrient companies have their bottom dollar at heart not your plants. The directions are often times to much so you use more.

Quit listening to a bottle and listen to your plants.

 

[Afta]

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Looks to me like a p def..red stem and blueish mark...had this happen to me ph pen was uncalibrated...the next time i fed her i checked ph with gh test and within 24hours was better... so yeah soil ph ..check it

 

[blue...yum]

Found out they are sweet mango autoflowers. The stems are naturally purple, both mango plants have it and from pictures of other sweet mangos it seems they all have it. I will check ph again, and see what it comes up as.


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