2Hearts
Well-Known Member
Im not sure if this is the right place or right information but i would like to put this out there and see what happens.
In terms of plant physiology and nutrient transport/translocation i would like to give my two centsand try and tackle this very tricky subject. Please wade in and call me a douch but please understand this is no big deal, im not trying to define the be all and end all of that dreaded purple on those small tender new growing tips and stems (although i think it will make for an intresting read before you take that bottle of phosphorous and hope it will paint your plant green).
Please ignore my slightly jumped up attitude....
So we plant a seed and take her to veg but we constantly see new growth purpling as well as the stems. Someone call Phosphorous deficiency but that dont work and someone else calls purple strain genetics so unable to turn that purple back to green we sit there and think cool i have purple strains.
Hmm, at this point id like to interject. The plant uptakes nutes through the xylem and uses relocates nutrients to where there needed with the phloem. Two different systems, one to uptake and one to relocate nutes in time of defficiency or storage in times of plenty. The phloem do not do what the xylem do i.e. draw from the soil and visa versa.
Phosphorous is highly mobile through the phloem and easily translocated from the older leaves to the new growing tips (as is nitrogen and potassium). With that said it would be very very hard for a phosphorous deficiency to show on new growth as the plant will sacrifice any older leaves to keep its growing tip going.
Calcium isnt mobile like phosphorous, its the kind of deficiency that shows up on new growth. Just cold soil can make the transport through the xylem very difficult and the phloem cannot move calcium around the plant like phosphorous so a deficiency will affect new growth and the phloem cant strip older growth to supply new growth. Right about now the plant is stunting and calcium is the limiting factor.
So new growth showing purple tinges is so much more likely to be calcium than its ever likely to be phosphorous. But what about those stems and petiols, some are turning purple on new grown leaves as well as older leaves. Most gardening sites would simply point you to the fact that the phloem system does not service the non transpiring parts of the plant well. Stems and petiols always suffer first when a non mobile nutrient such as calcium is in short supply, the plant needs to give the energy builiding blocks of the plant the available calcium first so stems which dont transpire are left to last but show symptoms first.
This info is freely available on plant forums and fact sheeets but i find it contradicts a lot of mj growers advice.
I know what cures my purple on the new growth so merely im just opening this topic up for discussio.
Grow weed, tune out and drop out
and potassium
In terms of plant physiology and nutrient transport/translocation i would like to give my two centsand try and tackle this very tricky subject. Please wade in and call me a douch but please understand this is no big deal, im not trying to define the be all and end all of that dreaded purple on those small tender new growing tips and stems (although i think it will make for an intresting read before you take that bottle of phosphorous and hope it will paint your plant green).
Please ignore my slightly jumped up attitude....
So we plant a seed and take her to veg but we constantly see new growth purpling as well as the stems. Someone call Phosphorous deficiency but that dont work and someone else calls purple strain genetics so unable to turn that purple back to green we sit there and think cool i have purple strains.
Hmm, at this point id like to interject. The plant uptakes nutes through the xylem and uses relocates nutrients to where there needed with the phloem. Two different systems, one to uptake and one to relocate nutes in time of defficiency or storage in times of plenty. The phloem do not do what the xylem do i.e. draw from the soil and visa versa.
Phosphorous is highly mobile through the phloem and easily translocated from the older leaves to the new growing tips (as is nitrogen and potassium). With that said it would be very very hard for a phosphorous deficiency to show on new growth as the plant will sacrifice any older leaves to keep its growing tip going.
Calcium isnt mobile like phosphorous, its the kind of deficiency that shows up on new growth. Just cold soil can make the transport through the xylem very difficult and the phloem cannot move calcium around the plant like phosphorous so a deficiency will affect new growth and the phloem cant strip older growth to supply new growth. Right about now the plant is stunting and calcium is the limiting factor.
So new growth showing purple tinges is so much more likely to be calcium than its ever likely to be phosphorous. But what about those stems and petiols, some are turning purple on new grown leaves as well as older leaves. Most gardening sites would simply point you to the fact that the phloem system does not service the non transpiring parts of the plant well. Stems and petiols always suffer first when a non mobile nutrient such as calcium is in short supply, the plant needs to give the energy builiding blocks of the plant the available calcium first so stems which dont transpire are left to last but show symptoms first.
This info is freely available on plant forums and fact sheeets but i find it contradicts a lot of mj growers advice.
I know what cures my purple on the new growth so merely im just opening this topic up for discussio.
Grow weed, tune out and drop out
and potassium
