Battling deficiencies, expert help needed

Tassie grower

Member

• Dec 10, 2023

• #1

Have a few deficiencies going on atm 4 plants affected all in canna terra professional soil, temp humidity vdp all within range, not sure if it's calcium and or phosphorus or something else ph is always 6.2 runoff ph the same, maybe slightly overwatered, could use some expert opinions and diagnosis,

 

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Phytoplankton

Well-Known Member

• Dec 10, 2023

• #2

What nutes are you using, organic or synthetic?

 

Tassie grower

Member

• Dec 10, 2023

• #3

I'm using canna vega flores and cal mag

 

Burndoggin

Well-Known Member

• Dec 10, 2023

• #4

They look hungry to me. But I'm no expert in any way.
Good luck.

 

HydoDan

Well-Known Member

• Dec 10, 2023

• #5

Cannabis Plant Deficiencies, How to Fix Them Fast - Percys Grow Room

 

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Phytoplankton

Well-Known Member

• Dec 10, 2023

• #6

The terra Flores is for flowering, which you’re in, but do you still use a little terra vega? It looks light on N. Also what is your media? The terra nute line is not recommended for use in peat soils unless they’re precharged.

 

Tassie grower

Member

• Dec 10, 2023

• #7

Phytoplankton said:

The terra Flores is for flowering, which you’re in, but do you still use a little terra vega? It looks light on N. Also what is your media? The terra nute line is not recommended for use in peat soils unless they’re precharged.

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My media is canna terra professional soil, I was a bit late to provide vega nutes initially I was thinking not enough nitrogen,

 

Fallguy111

Well-Known Member

• Dec 10, 2023

• #8

If you’re overwatering it’s hard to tell because too much water causes many issues. If you’re top feeding dry amendments you have to be 2 weeks ahead of the game. Keeping a journal and running a cultivar multiple times will help you dial it in

 

Fallguy111

Well-Known Member

• Dec 10, 2023

• #9

Compost tea can be a great way to get things back on track

 

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Lou66

Well-Known Member

• Dec 11, 2023

• #10

HydoDan said:

Cannabis Plant Deficiencies, How to Fix Them Fast - Percys Grow Room

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Are you sure that site is any good? Besides the plethora of spelling errors it recommends epsom salt to treat calcium deficiency. Epsom salt contains no calcium.

 

HydoDan

Well-Known Member

• Dec 11, 2023

• #11

Lou66 said:

Are you sure that site is any good? Besides the plethora of spelling errors it recommends epsom salt to treat calcium deficiency. Epsom salt contains no calcium.

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"What usually causes a calcium problem, is a lack of magnesium. Without magnesium, calcium can not be broken down properly by the plant, so though there might be plenty of calcium in the medium, it is not available to the plant."

 

Fallguy111

Well-Known Member

• Dec 11, 2023

• #12

I’m mostly a “bro scientist “ but I’ve never added calcium aside from pre amending lime/oyster shell but I do add a teaspoon of epsom to every other gallon of water. If I use ro I add every watering

 

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Lou66

Well-Known Member

• Dec 11, 2023

• #13

HydoDan said:

"What usually causes a calcium problem, is a lack of magnesium. Without magnesium, calcium can not be broken down properly by the plant, so though there might be plenty of calcium in the medium, it is not available to the plant."

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Another reason to avoid the site. Calcium is passively taken up by the plant when transpiring. If there is excess magnesium in the root zone (as opposed to a balanced ratio) calcium uptake is even inhibited.
I do not understand how calcium can be "broken down". We are talking about dissolved ions. To break calcium ions into smaller bits you need a nuclear chemist wielding a particle accelerator.

 

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Lou66

Well-Known Member

• Dec 11, 2023

• #14

Fallguy111 said:

I’m mostly a “bro scientist “ but I’ve never added calcium aside from pre amending lime/oyster shell but I do add a teaspoon of epsom to every other gallon of water. If I use ro I add every watering

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Then you have a soil rich in calcium or hard water. When you use coco (it acts as a sponge for calcium) and/or low transpiration (common under LEDs) calcium deficiency is rather common.

 

Burndoggin

Well-Known Member

• Dec 11, 2023

• #15

Lou66 said:

break calcium ions into smaller bits you need a nuclear chemist wielding a particle accelerator.

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Great.... Another $50 toy I need to add to my room
This is why I hate soil. By the time problems show and time to fix, it takes way to long to rectify them. But I'm an anxious grower in Promix and mega crop.
Easy effin peasy

 

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ec121

Well-Known Member

• Dec 11, 2023

• #16

Tassie grower said:

I'm using canna vega flores and cal mag

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EC?

 

Nizza

Well-Known Member

• Dec 11, 2023

• #17

How much light are you providing?

 

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Roguedawg

Well-Known Member

• Dec 11, 2023

• #18

they look overwatered to me. All the cations compete with each other, some like K are easily and rapidly taken up all along the root, some are not like Ca. it is only taken up from the tip, but if you increase the amount in solution of one it will decrease the amount of another cation or all the other cations. The sum of cations taken up will always be almost the same, the amount of each in solution will effect how much of each cation is taken up.

 

Tassie grower

Member

• Dec 12, 2023

• #19

ec121 said:

EC?

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Total ec

Nizza said:

How much light are you providing?

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Got a viparspectra xs2000 and an xs 1500 the plants are getting about 550 600 ppfd, using the uniT lux meter and converting the number to ppfd then ppfd to dli

 

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ec121

Well-Known Member

• Dec 12, 2023

• #20

Tassie grower said:

Total ec

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Do you have a PPM or EC meter? When you mix all your nutes, what number is the EC or PPM of the feed?