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some sorta deficiency

A

anon710

Member
In pro mix hp, botanicare line
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plants look fairly healthy other than a few of the bigger fan leaves going like the pics. Any ideas?
 
AgentPothead

AgentPothead

Just this guy, ya know?
I guess increase the dose a bit see if that helps? Maybe somebody else with more experience in promix will pipe up :)
 
T

TanzanianMagic

Well-known member
Veteran
anon710 said:
In pro mix hp, botanicare line




plants look fairly healthy other than a few of the bigger fan leaves going like the pics. Any ideas?
Click to expand...
A few points:

- The plants look great
- The plants are in flowering
- They need more Mg, P and K because of flowering
- They can do with more root pace, which will lead to much more proliferous flowering and a bigger harvest with fewer nutrient deficiencies; if you transplant at this stage, use light or non-fertilized soil so the roots can't burn;
- The pots may be too cold on the floor, and the cold may be locking out magnesium, phosphorus and potassium.
- The use of R/O water: this may lead to deficiency in magnesium, especially at the start of flowering.
 
YukonKronic

YukonKronic

Active member
From Joe Fresh guide




Calcium deficiency

Calcium (Ca) deficiency is a plant disorder that can be caused by insufficient calcium in the growing medium, but is more frequently a product of low transpiration of the whole plant or more commonly the affected tissue. Plants are susceptible to such localized calcium deficiencies in low or non transpiring tissues because calcium is not transported in the phloem. This may be due to water shortages, which slow the transportation of calcium to the plant, or can be caused by excessive usage of potassium or nitrogen fertilizers.


Problems with Calcium being locked out by PH troubles

Very acidic soils with excessive potassium, dry and or wet soil. Lack of calcium in the soil may cause too acidic soil. This may cause to Mg or Iron deficiency or very slow stunted growth


Soil


Calcium gets locked out of soil growing at ph levels of 2.0- 6.4
Calcium is absorbed best in soil at a ph level of 6.5-9.1 (Wouldn’t recommend having a ph of over 7.0 in soil) anything out of the ranges listed will contribute to a
Calcium Deficiency.


Hydro and Soil less Mediums

Calcium gets locked out of Hydro and Soil less Mediums at ph levels of 2.0- 5.3
Calcium is absorbed best in Hydro and Soil less Mediums at ph levels of 5.4-5.8 (Wouldn’t recommend having a ph over 6.5 in hydro and soil less mediums.) Best range for hydro and soil less mediums is 5.0 to 6.0. Anything out of the ranges listed will contribute to a Calcium Deficiency.



Causes
Soils that are acidic, sandy, or coarse often contain less calcium. Uneven soil moisture and over use of fertilizers can also cause calcium deficiency. At times, even when there is a lot of calcium in the soil, the calcium can be in an insoluble form and is then unusable by the plant. Soils containing high phosphorus are particularly susceptible to creating insoluble forms of calcium.

This may be due to water shortages, which slow the transportation of calcium to the plant, or can be caused by excessive usage of potassium or nitrogen fertilizers.

Calcium deficiency symptoms appear initially as localized tissue necrosis leading to stunted plant growth, necrotic leaf margins on young leaves or curling of the leaves, and eventual death of terminal buds and root tips. Generally the new growth and rapidly growing tissues of the plant are affected first. The mature leaves are rarely if ever affected because calcium accumulates to high concentrations in older leaves.
 
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