Nutrient Problem

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Nabber83

Member

• Aug 8, 2024

• #1

Hi
My plants are starting the pre flowering stage. Some fan leaves are showing a troubling yellow trend. I’ve attached a photo if anybody can help me find out if it’s a nutrient deficiency or nutrient burn. Thanks for any insight.

 

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OldMedUser

Well-Known Member

• Aug 9, 2024

• #2

Looks more like a bit of burn starting than a deficiency.

What are you feeding, how much and how often?

As it seems to be in the oldest fan leaves it is possible that the plant is just sucking up mobile nutrients to feed the active growing areas more as the start of flowering and the stretch is a big growth spurt where the plant feeds a lot heavier and wants lots of everything. Hopefully it has lots of P, K to aid with setting bud sites and getting flowers popping up fast.

 

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Nabber83

Member

• Aug 9, 2024

• #3

I’m just using tomato fertilizer this year as a test. The NPK ratio is 14-14-28 and I’m feeding once a week. I was away for two weeks so they got no nutrients. When I came home I doubled up and that’s the result

 

ProPheT 216

Well-Known Member

• Aug 9, 2024

• #4

Generic rule of thumb 90% of deficiency related issues will start at the bottom where overfeeding and lockout shows up in new growth

 

ProPheT 216

Well-Known Member

• Aug 9, 2024

• #5

Nabber83 said:

I’m just using tomato fertilizer this year as a test. The NPK ratio is 14-14-28 and I’m feeding once a week. I was away for two weeks so they got no nutrients. When I came home I doubled up and that’s the result

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That's not a bad ratio, a little hot on nitrogen, about 2 maybe 3 times what you need in N, the rest is optimal. Should produce a fair result

 

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Nabber83

Member

• Aug 9, 2024

• #6

Will it hurt to have that much nitrogen during flowering? I was hoping to try this fertilizer throughout the grow

 

7CardBud

Well-Known Member

• Aug 9, 2024

• #7

My outdoor plants always drop some of the old large bottom fan leaves during transition time. If the top half of the plant looks fine I wouldn't worry about it.

 

ProPheT 216

Well-Known Member

• Aug 9, 2024

• #8

Nabber83 said:

Will it hurt to have that much nitrogen during flowering? I was hoping to try this fertilizer throughout the grow

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It could hinder flower not gonna lie. U want about 1/3 of thAt nitrogen. Jacks 5 12 26 is a great solution plus some cal nitrate. Less than 40 bucks together. 4 grams of jacks, 2 of cal nit. I add recharge, bio available silica, and some systemic pest shits (sns209). That's it