We’ve selected the best varieties for this summer of 2024, designed to withstand the highest temperatures. No need for intensive maintenance with these seeds!
And remember – we add extra seeds to every pack of 3, 5 or 10!
*CBD strains not included
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The cannabis plant loves the sun as well as plenty of water. However, heat and humidity are two vital factors that need to be carefully controlled in order to grow a successful crop. Even if you live in an arid or tropical area, you need to know which of the cannabis strains in our catalogue are the most suitable for those environments.
Marijuana plants are really hardy and can grow and survive virtually anywhere, weather permitting. Nonetheless, they will struggle if the temperature is too high and will therefore be unlikely to deliver the desired effects.
The easiest way to prevent heat issues is to select strains that adapt well to the climate of the region where you live. You can also use grow rooms or greenhouses to create the perfect environment. However, even in a dedicated indoor space, you don’t want your plants to get too hot or they will suffer from unnecessary thermal stress.
The ideal growing temperature ranges between 23 and 25°C. As temperature increases beyond these optimal levels, there is a slow decline in the health and development of the plants. Indoors, many growers consider that the 30°C limit is already too high. Outdoors, however, plants can endure temperatures above 35°C in mid-summer, but this is when growth becomes very difficult.
The good news is that marijuana plants don’t stop developing when it is too hot, although their growth slows down. This is because excessive heat affects the photosynthesis process. Enzyme activity becomes stunted, and plants produce very few proteins, which can result in loose, airy buds. Potency and aroma may also be reduced.
Too much heat can lead to the plant experiencing what is known as ‘heat stress’, which can result in a whole range of setbacks:
Just as too much heat can be harmful, high humidity levels can also be dangerous. Cannabis plants are grown in a relative humidity range of 40-70%, depending on their stage of growth.
In order to prevent the appearance of mould, fungi, and pests, many strains require low levels of ambient humidity, particularly during the flowering phase. In addition, as plants absorb more water from the environment, they absorb less from the nutrient-rich soil, and the perspiration process slows down, leading to a wide variety of added problems.
But low humidity can also be a problem. If the area where you live is warm and dry, the upper layers of the soil can dry up, heat up, and then burn the roots of the plants until they die. Besides, if the plants grow in low humidity conditions, they will take more water through their roots; and if the soil is rich in nutrients, the plants can absorb them too quickly and end up burning due to nutrient excess.
If you’re growing indoors, creating and maintaining the ideal temperature starts by making sure that you have a good ventilation system so that the hot air can be removed to the outside. Air conditioning and dehumidification equipment are also excellent solutions for maintaining optimum temperature and humidity levels in larger grow rooms.
Controlling these parameters outdoors is more complicated. Fortunately, protecting your cannabis plants from excess heat requires almost the same method you would use to protect yourself: keep them hydrated. Use micro sprayers to refresh your plants. You can also keep the roots cool by using fabric pots, which allow the roots to breathe.
The time you choose to water your plants can also help keep them hydrated. If you water them early in the morning before sunrise or in the evening after sunset, the water evaporates more slowly and so the plants are able to absorb more.
Placing the plants in the shade can also help. However, you should only do this during the occasional heat wave: if your plants are not regularly exposed to direct sunlight, they may go into shock when they are finally exposed to it.
When you grow marijuana in a hot region, it is best to choose varieties that originate from similar climates. Most of them are sativas, but there are also a lot of hybrids that work perfectly.
Sativa strains have a strong tradition of cultivation in Southeast Asia and Central and South America. They are naturally resistant to tropical and subtropical climatic conditions, which entail high heat and humidity.
By contrast, indicas can be traced back to the warm, dry mountains of the Middle East and Central Asia, so they require low humidity conditions to flower. All in all, sativas may be more suitable for extreme heat conditions, whereas indica strains may be more suited to more temperate and dry climates.
In our seed catalogue you will find many varieties that are well adapted to the heat. They are genetics of proven quality that will surely lead to a successful grow in warm conditions, in both dry and tropical climates. For example:
KRITIKAL-K: This variety is ideal for places that enjoy the environmental conditions of the Mediterranean climate, with long summers and lots of sun. However, if you live in a more northern region, this strain is also a great option to grow in a greenhouse.
WHITE DOMINA: Another plant that adapts very well to the Mediterranean climate. Its flowering has been reduced to 50-55 days to prevent any humidity problems, so its harvest is scheduled for mid-September, when it delivers an incredible amount of resin of unparalleled quality.
LA BLANCA: A plant in the midpoint between a sativa and an indica, with a wild flavour that’s full of nuances. This strain behaves really well in warm weather conditions, and is also the perfect match for guerrilla crops, where resistance to both the heat and a lack of water is a virtue.
INDICA CREAM: Another of the feminised cannabis seeds that’s a favourite of indica lovers and that reaches its fullness in dry and warm climates, developing wide leaves and close internodes that produce compact buds as big as fists.
KARIBBEAN MANGO: An all-rounder that shows good resistance to pests and fungi. Thanks to its slight sativa genetics (barely 10%), it can reach up to three meters in height when grown outdoors, with a flowering period of between 60 and 65 days, resulting in buds that combine exquisite tropical flavours with a really soothing effect.
BIG BULL: Another classic strain, and one of the most versatile and adaptive plants in the Kannabia catalogue, that shows good resistance to pests and diseases and all kinds of pruning and cultivation techniques. Providing it gets plenty of sun, it will reward you with a harvest full of flavours in the second week of September that will remind you of the old school genetics.
And you’ll also find all our AUTOFLOWERING varieties, of course! The automatic strains are especially successful in warm areas with very mild winters, where there is the possibility of growing them for months beyond the summer, thereby producing up to three harvests per year. Summer is definitely when the autos work best outdoors. They love the long, warm days of June!
As you can see in the Kannabia Seeds’ catalogue, we have the best marijuana seeds to grow in warm climates: cannabis icons that have already reached the status of legends and have won awards on countless occasions due to their amazing flavours and powerful effects. Make sure you get them before they’re gone!
Kannabia Seed Company sells its customers hobby (collection) seeds for personal use. Its germination and cultivation is prohibited. The buyer undertakes to consult the legislation in force in his country of residence to avoid incurring in the performance of an illegal activity.
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