Top 5 strains for a hot and humid climate
Which are the best strains to grow in high heat? If your local climate has hot summers, then you need to know the best heat resistant cannabis seed varieties which will maximise your chances of a successful summer harvest. The best heat tolerant cannabis strains can grow with greater latitude and resistance to the tough challenges faced when growing in fierce summer sun.
What temperatures are too high for cannabis to grow in?
What temps are too hot for cannabis? Cannabis growth and bloom production is adversely affected as heat increases. The ideal growing temperature for cannabis is around 23-25ºC (73ºF - 77ºF). As temperature increases it becomes increasingly difficult for the plant biochemistry to perform with the same efficiency.
There is no single ‘magic’ temperature at which cannabis refuses to grow. Instead, think of it as a slow decrease in plant health and growth as temperature increases beyond optimum levels.
How hot is too hot for indoor cannabis plants? Many indoor growers would consider temperatures of 26-30ºC (79ºF - 86ºF) to be above optimum and would take corrective action to reduce them. As indoor grow room temperatures start to reach 30ºC, many would consider the cannabis grow room too hot to be able to produce optimum quality harvests.
Outdoor growers may have to watch their cannabis plants try to tolerate temperatures in excess of 35ºC in mid summer. At temperatures around 35ºC growth becomes very difficult, yield and quality will be affected. The quality conscious grower is very much aware of the maximum temperatures, the adverse effect on yield/quality and the need to mitigate temperatures where possible.
Best cannabis seeds to grow in a hot and humid climate
Hot climates come with different challenges. Some climates have high temperatures as well as high humidities. These humid, moist and hot climates suit sativa strains such as Desfrán (and Auto Desfrán) / Power Plant (and Auto Power Plant) / Skywalker Haze (and Auto Skywalker Haze / Auto Daiquiri Lime / Auto Euforia.
Some hot climates are accompanied by low humidity and possible low evening temperatures. These environments can suit heat resistant indica strains such as Mazar (and Auto Mazar) / Banana Blaze (and Auto Banana Blaze) / Master Kush / Auto Night Queen / Auto Blackberry Kush (possibly Blueberry / and Auto Blueberry).
The following 5 cannabis seed recommendations are all hot climate cannabis strains which have above-average heat resistance. If you need the best cannabis strains for a hot climate, these strains are all highly recommended.
Desfrán, multi cannabis cup winning jungle sativa genetics
Desfrán was originally a 3-way crossing of Mexican Oaxaca, Colombian Punto Rojo and Meao Thai. This fine blend of classy sativa genetics became known as ‘Destroyer’, Desfrán is a Destroyer x Destroyer cross, a photoperiod feminised seed variety.
Part of the Latin American cannabis seed collection. These jungle sativa genetics are well adapted to hot, humid conditions. Desfrán is a stretchy strain, indoor growers should note she can triple her height during bloom and can fill all available grow space. Outdoors, she can reach 3-4m tall, be prepared!
If your available grow space is limited you may want to consider the autoflowering seed version, Auto Desfrán. Outdoor auto feminised cannabis seeds for hot climates rarely come better equipped to deal with extreme temperatures. She grows from seed to harvest in around 12-15 weeks, the pure sativa genetics take a little longer than average to complete bloom. THC levels are very high!
|Desfrán indoor grow review|
Mazar, the ultra-tough legendary Afghani Kush
Mazar is one of the toughest heat resistant indica strains. She can cope well with high temperatures in low humidity environments. This means she will cope better with outdoor life in a European (or North American) heatwave better than she would cope with permanent life in a steamy, humid jungle. Thanks to the durable Afghani Kush genetics, Mazar also shrugs off cool evening temperatures better than most.
If you’re growing indoors in a hot climate, Mazar is also a solid choice. Just ensure your RH (relative humidity) levels are kept as low as you can manage. Fans of autoflowering cannabis seeds should give serious consideration to Auto Mazar when looking for heat resistant strains. Auto Mazar is equally popular with both indoor and outdoor growers.
The fully proven, cannabis cup winning genetics are tough enough to cope with most grow environments and have the THC levels to satisfy the most demanding connoisseurs.
|Auto Mazar grow review with LED lights|
Skywalker Haze, heat resistant strain with stunning potency
Skywalker Haze was created from two THC powerhouse strains, Original Skywalker and Amsterdam Amnesia. If you’re looking to grow outdoor cannabis in hot weather, sativa strains like Skywalker Haze are a solid choice.
The sativa bud structure is a little more open, airy and less dense than indica buds - making them less prone to mold and bud rot. This helps make sativa strains popular in hot, humid climate cannabis grows.
With very high THC levels, Skywalker Haze will satisfy the quality-conscious grower. She takes around 9-10 weeks to complete indoor bloom and is part of the Dutch Passion Classics cannabis seed collection, home to some of the best selling customer favourites. Auto Skywalker Haze seeds are a must-grow for any serious auto grower.
With independently verified THC levels of 26.2%, Dutch Passion have never seen a more potent autoflower strain than Auto Skywalker Haze. As well as being easy to grow with good yields, this autoflowering THC monster is one of the best cannabis strains for hot climate outdoor temps.
|Auto Skywalker Haze grow review|
Banana Blaze, old school Kush with a sweet banana taste
Growers with hot summers will find that the old school banana indica Banana Blaze is a robust and tough selection. Part of the Afghani Kush cannabis seed collection, these hardy and resilient genetics grow in a wide range of conditions.
Banana Blaze is more suited to hotter climates without high humidity levels. This forgiving indica is able to produce a generous crop of high quality cannabis in conditions where lesser strains would fail.
Lovers of fruity indica strains with a sweet and unusual banana taste will love Banana Blaze. She is easy to grow and delivers even in the hotter summers. Auto Banana Blaze is equally recommended as one of the best hot climate cannabis seeds. She grows from autoflower seed to harvest in around 12 weeks with generous harvests and very high THC levels.
|Banana Blaze grow review|
Power Plant, legendary XXL yielding sativa genetics
Power Plant is one of the most iconic cannabis sativa strains from recent decades. Still found in discerning Dutch coffee shops, Power Plant is famous for her powerful high and notoriously heavy harvests.
She only takes around 8 weeks in bloom making her an excellent choice for those wanting a fast crop. Can cannabis plants tolerate hot weather? This strain certainly can! She can also cope with high humidity levels better than many other strains too.
Auto Power Plant is the autoflowering seed version, also highly recommended to any grower seeking a heat resistant strain. The durable and dependable sativa auto genetics have the right genetic pedigree to tolerate hot weather. Auto Power Plant takes around 12 weeks to grow from seed to harvest.
|Power Plant indoor grow review|
Hot climate cannabis growing essential tips
When grown in hot soil, cannabis faces extra challenges. Not all cannabis genetics are well suited to coping with such conditions. But choosing cannabis seeds of the best strains to grow in high heat is the best way to start.
If your plants are outdoors in movable containers then you can move your plants into shaded, cooler conditions during the hottest hours. Or you could create a temporary shelter, covering your plant with some tarpaulin/material to protect it from the midday sun. Indoor growers can consider the use of air conditioning. All growers should be keen to ensure sufficient water for their plants in hot weather.
How to select the best suited seeds for hot climates?
Indica as well as sativa strains should be considered. An experienced cannabis seed company should have many years of experience, knowledge and understanding of their best strains to grow in high heat. If you don’t have personal experience working with heat resistant strains, then choose an experienced seedbank for their recommendations.
How to identify cannabis plants' heat stress symptoms?
The classic drooping signs of leaves and branches are the same across many garden plants as the rate of moisture loss exceeds the rate at which the plant can replenish that water loss. If in doubt, don't delay. Remove your plant from direct sunlight (or switch your internal lights off for a while) and do your best to cool conditions down, moving the plant if necessary.
How to handle overheated soil when growing cannabis?
Water can cool down an overheated container of soil, so can removing it from direct sunlight. Avoid leaving black (heat absorbing) containers in direct sunlight since they can heat up and overheat the soil and root ball. Try covering the container with white or reflective material or moving the plant to a cooler area. If soil overheats it takes time to cool down. As always, prevention is better than cure.
How hot is too hot for indoor cannabis plants?
Indoor growers are advised to take action as heat pushes temperatures towards 30ºC (86ºF). Some growers avoid growing indoors during mid summer simply because they know that avoiding hot weather will improve harvest quality/quantity. Serious growers will install internal air conditioning and simply accept that the cost is part of the price of maintaining quality when growing in a hot climate.
How to dry and cure cannabis in hot weather?
Cannabis curing in hot weather can present challenges. Ideally, buds should be dried and cured gradually. How long should cannabis dry in a hot dry climate?
Often growers will place their trimmed buds and branches in their grow room (with extraction and filtration) for 7-10 days to dry out. If it’s too hot and your buds are crispy in just a couple of days, you will lose some of the tasty terpenes.
You may be able to slow down the drying process by placing your buds inside paper bags, but the preferred option is to avoid drying buds in excessively hot environments, around 20ºC/70ºF is quite adequate.
What happens if cannabis is stored in a hot environment? Cannabis taste and potency degrade if the buds are stored in hot conditions. Once the buds are dry and have had a chance to cure for a couple of months in cool conditions, many connoisseurs will store them in the fridge or freezer to preserve the quality.
|How to identify and cure cannabis heat stress|