Kopfgeburt
New member
I hope this is the correct place to post my topic.
As you can see I`m a complete Newbie on the Icmag boards but have been lurking OG/CW for several years. My practical experience consists of 3 outdoorgrows and 2 inddoorgrows on cogr with moderate to better results.
As I started an apprenticeship on an organic farm i stumbled upon the topic of grafting in vegetable production. Rather intrigued about the effects that can be observed (only books, no first-hand-experience) I searched cannabisrelated sites, but found almost no results. Thus I want to ask the community about experiences, as I can not believe that noone ever tried it.
I am in no way an expert, I just wanted to hear some others opinion on the applicability of my ideas.
In horticulture the grafting of closely related plants is widespread. A scion is -with different techniques- grafted on a “rootstock“ of a closely related species. For example tomatoes are grafted on wild tomatoe- rootstocks or specialized cultivars/strains (i.e. Maxifort), cucumbers and watermelons on figleaf gourd (cucurbita ficifolia), aubergines are also often grafted on tomatoe-rootstocks.
There are two main reasons for this practice:
1 The rootstock is resistant or tolerant to a multitude of soilborne pathogens (esp. Fusarium oxysporum races, Pythium, Verticulum, Nematodes, as well as non-soilborne pathogens i.e Botrytis, Mildew...
2 The rootstock increases overall growth and productivity.
3 In some cases a positive or negative influence on fruit/product quality is observed
After the grafting procedure is completed, the whole plant inherits the resistances/tolerances of the rootstock. (Correct?)
Searching cannabisworld and overgrow on grafting, only few results turned up. About the only described application is the grafting of scions from different strains on one motherplant.
Based on my belief that the procedures in vegetable horticulture can be implemented in our specialized gardens i try to describe several scenarios in which grafting might be usefully applicable.
1: Outdoor cultivation:
A: Mould resistance could be increased. So, heavy indicas or skunkhybrids might gain some time in rainy autumn before mould becomes a problem if grafted on resistant outdoorvarieties .
B: By grafting, one might also change growth characteristics of plants. Pure/mostly sativas could be kept smaller without too much tying while growth of indica-dominant plants might be increased by using appropriate rootstock.
C: it might be possible to cultivate indicas/indica-dominant plants with acceptable yields in the tropics by grafting on regional strains.
2 Indoor cultivation:
Considering the possible influences on growth characteristics, I believe that, as the production of hormones is mainly organized in the wortel, sativarootstock would increase the growth rate of Indicas under 12/12, and vice versa. (As is done with Fruittrees)
A: Diminishing cultivation time under high light requirements.
By grafting Indicas/ mostly Indicas on pure sativa-rootstock one could decrease time of plants in the growroom under hid. Even if one assumed 3 weeks for proper connection between plants, this might well be compensated in less time of 18/6 under Hid. Thus also the effect of adaption to lower light levels (lower compensation point and lower optimum assimilation performance) might be moderated.
B: Fairly consistent height with different strains/cultivars. By growing different strains in the same
room/closet one often has to cope with different plant hights (not to mention different nutrient requirements or finishing times) especially in closets with only one light.
Grafting on identic rootstock one might be able to dimish height differences.
C: Increased mould tolerance could be an option to use graftings especially under suboptimal conditions,
Potential drawbacks:
Need to keep rootstock motherplants
need to select for traits less easily observed than potency or yield
need to graft (time consuming with high plant numbers)
need to grow twice the cuttings (higher plant numbers)
Additional Questions:
How is the reception of dark hours organized in the cannabis plant?
In which ways do gibberellines and cytokinines produced in the roots act in the process of flower initiation?
Has anyone tried the graftin on hops (humulus lupus) in 70s/80s publications one may stumble over the mention of grafting cannabis on hops. As several botanists declare hops to be the second member of the cannabiacae-familiy this could be possible (but hops are extremely sensitive to mould).
As you can see I`m a complete Newbie on the Icmag boards but have been lurking OG/CW for several years. My practical experience consists of 3 outdoorgrows and 2 inddoorgrows on cogr with moderate to better results.
As I started an apprenticeship on an organic farm i stumbled upon the topic of grafting in vegetable production. Rather intrigued about the effects that can be observed (only books, no first-hand-experience) I searched cannabisrelated sites, but found almost no results. Thus I want to ask the community about experiences, as I can not believe that noone ever tried it.
I am in no way an expert, I just wanted to hear some others opinion on the applicability of my ideas.
In horticulture the grafting of closely related plants is widespread. A scion is -with different techniques- grafted on a “rootstock“ of a closely related species. For example tomatoes are grafted on wild tomatoe- rootstocks or specialized cultivars/strains (i.e. Maxifort), cucumbers and watermelons on figleaf gourd (cucurbita ficifolia), aubergines are also often grafted on tomatoe-rootstocks.
There are two main reasons for this practice:
1 The rootstock is resistant or tolerant to a multitude of soilborne pathogens (esp. Fusarium oxysporum races, Pythium, Verticulum, Nematodes, as well as non-soilborne pathogens i.e Botrytis, Mildew...
2 The rootstock increases overall growth and productivity.
3 In some cases a positive or negative influence on fruit/product quality is observed
After the grafting procedure is completed, the whole plant inherits the resistances/tolerances of the rootstock. (Correct?)
Searching cannabisworld and overgrow on grafting, only few results turned up. About the only described application is the grafting of scions from different strains on one motherplant.
Based on my belief that the procedures in vegetable horticulture can be implemented in our specialized gardens i try to describe several scenarios in which grafting might be usefully applicable.
1: Outdoor cultivation:
A: Mould resistance could be increased. So, heavy indicas or skunkhybrids might gain some time in rainy autumn before mould becomes a problem if grafted on resistant outdoorvarieties .
B: By grafting, one might also change growth characteristics of plants. Pure/mostly sativas could be kept smaller without too much tying while growth of indica-dominant plants might be increased by using appropriate rootstock.
C: it might be possible to cultivate indicas/indica-dominant plants with acceptable yields in the tropics by grafting on regional strains.
2 Indoor cultivation:
Considering the possible influences on growth characteristics, I believe that, as the production of hormones is mainly organized in the wortel, sativarootstock would increase the growth rate of Indicas under 12/12, and vice versa. (As is done with Fruittrees)
A: Diminishing cultivation time under high light requirements.
By grafting Indicas/ mostly Indicas on pure sativa-rootstock one could decrease time of plants in the growroom under hid. Even if one assumed 3 weeks for proper connection between plants, this might well be compensated in less time of 18/6 under Hid. Thus also the effect of adaption to lower light levels (lower compensation point and lower optimum assimilation performance) might be moderated.
B: Fairly consistent height with different strains/cultivars. By growing different strains in the same
room/closet one often has to cope with different plant hights (not to mention different nutrient requirements or finishing times) especially in closets with only one light.
Grafting on identic rootstock one might be able to dimish height differences.
C: Increased mould tolerance could be an option to use graftings especially under suboptimal conditions,
Potential drawbacks:
Need to keep rootstock motherplants
need to select for traits less easily observed than potency or yield
need to graft (time consuming with high plant numbers)
need to grow twice the cuttings (higher plant numbers)
Additional Questions:
How is the reception of dark hours organized in the cannabis plant?
In which ways do gibberellines and cytokinines produced in the roots act in the process of flower initiation?
Has anyone tried the graftin on hops (humulus lupus) in 70s/80s publications one may stumble over the mention of grafting cannabis on hops. As several botanists declare hops to be the second member of the cannabiacae-familiy this could be possible (but hops are extremely sensitive to mould).
