Heat Tolerant strains

[gallo_naso]

Hello Fellow growers
I am in SoCal. In the LA basin. I have been growing outside for 3 years. The plants do well the are under 20% shade cloth. I have noticed that when we get out intense summer heat the plants suffer. They slow down and I get some leaf yellowing. I grew GSC and A sativa hybred "sour apple". The have done OK but I would like to concentrate on some plants that like the heat.
I was thinking some type of Sativa. I do not have much experience with them and would have to ease into it . Any advice would be appreciated. I have lurked on this site for a while and consider it one of the best and most informative of all.

 

[Rinse]

I grew some Swazi red beard some years ago, had them in a greenhouse at one point with 40c+ and they loved it, pure sativa and very strong.

You could also check out the Sinai from RSC, its from here

 

[Rumblefish]

G day I'm an Aussie grower and have to deal with temps over 40c even up to 44c over summer (that's about 110 Fahrenheit ) and have found it's more to do with insulating your garden bed with mulch than it is any particular variety, I usually use Lucerne hay and put it on as thick as I can,in the middle of the day I can put my hand under the mulch and the soil is cool and moist and the plants happy..these plants grew last year in the hottest summer on record and stayed happy in the full sun! CG Fuel

 

[wallywombat]

I grew some Swazi red beard some years ago, had them in a greenhouse at one point with 40c+ and they loved it, pure sativa and very strong.

You could also check out the Sinai from RSC, its from here

View Image

wow that strain would be extremely tolerant . interesting seeing her native homeland

 

[TrinZilla]

Our ThunderLuv had no adverse reaction to 116 degree heat, if anything they looked normal or slightly better than normal... We will be doing cold resistance testing this winter... Possible ruderalis trait?

 

[Jhhnn]

Mandala claims heat resistance for several varieties. They're pretty straight up about everything else, so I tend to believe them.

 

[CoCoColaClassic]

hi Gallo,

Consider looking at weather underground (http://www.wunderground.com/). Use their "historical data too" and find a two month period where the days are 12 hours long AND the temperatures are cooler during the last 4 weeks of growth. I'm in the south and mid September through Nov 10th is a great window for daytime temperatures and outside any nighttime freezes. Please know, I have never grown outdoors, but I've pondered it and made many excel spreadsheets tracking temperatures in order to plan for one someday.

 

[dank.frank]

Adding amendments that contribute silica greatly reduces the effects of heat stress on plants in general...



dank.Frank

 

[CoCoColaClassic]

hi Gallo,

Consider looking at weather underground (http://www.wunderground.com/). Use their "historical data too" and find a two month period where the days are 12 hours long AND the temperatures are cooler during the last 4 weeks of growth. I'm in the south and mid September through Nov 10th is a great window for daytime temperatures and outside any nighttime freezes. Please know, I have never grown outdoors, but I've pondered it and made many excel spreadsheets tracking temperatures in order to plan for one someday.

Corrections:
"historical data tool" AND "last four weeks of BLOOM"

 

[CoCoColaClassic]

Adding amendments that contribute silica greatly reduces the effects of heat stress on plants in general...



dank.Frank

Ditto! Silicate has been shown to helps strengthen cell walls (creating a barrier for pests) and causes the stomata to close slightly, thus slowing transpiration during hot days.

 

[30years]

i have a cut of candy kush that does great in your area. a few people have said that it took the heat the best down your way out of any of the clones they ran. it thrives in southern humboldt too with a oct 7th finish.
i had a friend bring it up from bay area right before oaksterdam got hit. i can't see any train wreck or og in it but it is a beautiful robust floral kush that has great mold and mildew resistance also.

 

[OakyJoe]

Most Strains from Afghan & Moroccan tolerad the heat without problems.

 

[RetroGrow]

Adding amendments that contribute silica greatly reduces the effects of heat stress on plants in general...



dank.Frank

When you say "amendments that contribute silica", are you talking about something other than liquid silica that I always use?

 

[dank.frank]

I mean, that works...sure...I'm not necessairly suggesting one methodology over any other with that post - but merely making that suggestion because it makes a huge difference.

However, since you asked:

I'm just a bit more simple than that. You know I simply water my gardens - so, I use diatomaceous earth in my mix as well as azomite - which is about 65% silica. So between the two of those - you have a built in resistance to heat and drought type conditions...some of which is immediately available and some of which is available over time as the soil develops more. The plant then has it at it's diposal when it needs it.



dank.Frank

 

[RetroGrow]

I mean, that works...sure...I'm not necessairly suggesting one methodology over any other with that post - but merely making that suggestion because it makes a huge difference.

However, since you asked:

I'm just a bit more simple than that. You know I simply water my gardens - so, I use diatomaceous earth in my mix as well as azomite - which is about 65% silica. So between the two of those - you have a built in resistance to heat and drought type conditions...some of which is immediately available and some of which is available over time as the soil develops more. The plant then has it at it's diposal when it needs it.



dank.Frank

Just want to make a point about diatomaceous earth, and an urban myth which I have seen perpetuated here on several occasions. Diatomaceous earth are skeletons of diatoms. They are not water soluble, and provide no silica to your plants. I just wanted to clear that up, as I have seen it posted a number of times, and don't want people to get the wrong idea. It has it's uses, and can also be used as a growing medium, but it does not provide silica to your plants.

 

[Bob Green]

Cannabiogen has some Swazi out right now. ACE has some nice African crosses out right now as well.

 

[dank.frank]

Just want to make a point about diatomaceous earth, and an urban myth which I have seen perpetuated here on several occasions. Diatomaceous earth are skeletons of diatoms. They are not water soluble, and provide no silica to your plants. I just wanted to clear that up, as I have seen it posted a number of times, and don't want people to get the wrong idea. It has it's uses, and can also be used as a growing medium, but it does not provide silica to your plants.

And you'd be wrong. It has at minimum 21 ppm of instantly available silica - and more as it breaks down over time...which it does do. How you'd ever use a food grade flour at as a medium is beyond me. It is comprised of over 80% silica - although, like you stated, not all of that is INSTANTLY available for uptake. Like most mineral amendments, the true benefit is seen over time - when recycling or when running beds.

Perhaps you are thinking of calcined DE - which is completely different...



dank.Frank

 

[Xanode]

Most Strains from Afghan & Moroccan tolerad the heat without problems.

I have to agree, a friend has afghans flowering in a tent at 40c celcius a lot of the time, not by choice mind you.... and they up and pray like it's 25deg

 

[Coughie]

I mean, that works...sure...I'm not necessairly suggesting one methodology over any other with that post - but merely making that suggestion because it makes a huge difference.

However, since you asked:

I'm just a bit more simple than that. You know I simply water my gardens - so, I use diatomaceous earth in my mix as well as azomite - which is about 65% silica. So between the two of those - you have a built in resistance to heat and drought type conditions...some of which is immediately available and some of which is available over time as the soil develops more. The plant then has it at it's diposal when it needs it.



dank.Frank

Just to add to this..... If you can find/grow Horsetail ferns, you're in the money.. composting horsetail ferns alongside everything else (comfrey, nettles, etc) will add silica to your top-dressing, if you grow in soil.

 

[Dr.Suess]

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