Outdoor Grow Guide Australia

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The grow season in Australia begins in August and runs through April. Keep in mind this depends on your specific situation and location. The best time to grow cannabis outdoors is during the spring. Growing weed outdoors is not expensive or difficult. You will need some basic information such as when to plant, the best fertilizers and soil, the cannabis strains and seeds to grow and how often to feed and water your plants. Once you have learned the basics, your cannabis plants will grow big and strong.

You can also grow in a colder temperature as opposed to warmer weather. You can grow plants at -4 C. A lot of growers have seen great results in these conditions so do not become discouraged when the weather turns cold. If you want your plants to thrive, you must give marijuana what it requires. Warm or sunny areas are better than cold areas with less sun. You should consider all of this if you want to grow marijuana correctly in outdoor Australia.

Cannabis Grow Facts

Averages are based on Brisbane, Perth and Melbourne.
The climate in Australia’s Southeastern tip including Tasmania is temperate. This means it is wetter and cooler than the rest of Australia.
The hottest days occur in the interior or desert of Australia.
The biggest difference between the coast and central Australia or the desert is that it is dryer and hotter. As a grower, your plants should be watered in higher quantities and more often.
Cannabis sativa - Medical cannabis

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A Month-by-Month Guide on Growing Weed Outdoors in Australia

The length of the average day is between 10.5 and 11.5 hours with an average temperature of eight to 18 degrees Celsius. In the desert, the average day is 11 to 11.5 hours with an average temperature of seven to 23 degrees Celsius. August is the ideal month to prepare for your future grow season. This is especially true if you live in the warmers areas of the coastline since the coldest weather will soon become history. Now is the time to prepare your plants and grow area.

The chance of any frost is unlikely, so you can almost start to grow marijuana in August. This is the reason your seeds should be ordered now so the germination process can begin as soon as possible. In most areas of the country, the growing season will last for some time. Plants with Sativa dominant genes will be fine in an outdoor setting. Indicas will not do as well because of the upcoming heat. Make certain you know what you are purchasing and do some research before ordering your seeds.

Your seedling’s ideal temperature is 20 to 25 degrees Celsius. Unless the weather turns unseasonably warm, starting your seedlings indoors is a good idea. You can bring them outside once the temperature consistently rises. If you intend to grow cannabis exclusively outdoors, the best option is to wait a while. You can prep your soil with worms and compost while you are waiting.

If you intend to clone your plants, this is a good month to start growing your mother plant. This should be done indoors. This ensures your cuttings can be taken earlier in the grow season.

The length of the average day is 11.5 to 12.5 hours with an average temperature of nine to 20 degrees Celsius. In the desert, the length of the average day is 11.5 to 12.5 hours with an average temperature between 11 and 27 degrees Celsius. The frost risk has decreased even further, especially in the warmer areas of Australia. If you have not already purchased your seeds, you need to do so now. If you have your seeds and the other necessities and soil are prepared, your young plants can be safely placed on your windowsill to start sprouting.

Watch the daylight hours closely since your young cannabis plants require a minimum of 12 hours every day to obtain enough energy for growth. If the month has just begun, the daylight hours remain under 12. You can use a grow lamp for supplementing the natural light. This is extremely important because your plants will be prevented from flowering early which is a tremendous waste.

If you have a mother plant growing for cloning, it needs to be ready by the beginning of September. This will ensure enough time remains for your clones to grow outside as the next few months pass.
The length of the average day is 12.5 to 13.5 hours with an average temperature between 11 and 22 degrees Celsius. In the desert, the length of the average day is 12.5 to 13 hours with an average temperature of 15 to 32 degrees Celsius. If some of your plants are growing on the windowsill, no artificial light is necessary beginning in October. This is because the amount of daylight substantially increases. Your plants still need the maximum hours of sunlight. Try for a minimum of 13 hours daily.

If the temperature is high enough, your cannabis can be removed from your windowsill and placed outside. This is possible if you are in the warmer areas of Australia. When the daylight temperatures reach 21 degrees Celsius, you can safely move your plants. You will need to bring your plants back inside at night due to drops in the temperature. If you are in a warmer area, this is the time to start making clones from your mother plant.
The length of the average day is 13.5 to 14 hours with an average temperature of 13 to 25 degrees Celsius. In the desert, the length of the average day is 13 to 14 hours with an average temperature between 13 and 35 degrees Celsius. The temperatures outside feel like spring or summer have arrived and it is safe to put your plants outside.

You can keep your plants outside all day and during the night provided the temperature remains above 15 degrees Celsius. If you have chosen autoflowering seeds, they can be planted in November. You can then harvest during the beginning of February.

The length of the average day is 14 hours with an average temperature between 15 and 27 degrees Celsius. In the desert, the length of the average day is also 14 hours with an average temperature between 20 and 36 degrees Celsius. December is the last month when there is an increase in daylight hours. Once January arrives, daylight hours start decreasing again.

This means your cannabis plants will grow substantially this month while in a vegetative phase. Expect the growth to continue accelerating. If your marijuana plants are autoflowering, this is when you will start to see flowers.


The length of the average day is 14 hours with an average temperature between 17 and 28 degrees Celsius. In the desert, the length of the average day is 13.5 hours with an average temperature between 23 and 39 degrees Celsius. The hottest months of the entire year are January and February, even though daylight has started to decrease. In January, autoflowering strains will really start to flower and produce large groupings of flowers.

You will see pre-flowers on your non-autoflowering cannabis plants. January is an incredibly important month if you are growing cannabis from regular or non-fertilized seeds. If you purchased feminized seeds, approximately fifty percent of your plants will be male. If you do not remove your male plants, the females will be pollinated and your harvest significantly reduced. The sex of your plants can be identified by examining the pre-flowers about two weeks before they can reproduce.

You should use this time to find all the male plants so they can be removed. Females and males can be identified by looking between their nodes to see what grows. Look for small pollen sacs on the males. They look somewhat like balls of small grapes. Look at the bracts to identify the females. Bracts are teardrop-shaped. Eventually, you will see white wispy stigmas growing from the pistils.

If you are unable to identify the sex, wait to see if white wispy hair appears. If it does, the plant is female. Keep a close watch over your plants so the males can be removed upon identification.


The length of the average day is 13 hours with an average temperature between 17 and 28 degrees Celsius. In the desert, the length of the average day is also 13 hours with an average temperature between 22 and 37 degrees Celsius. Once your marijuana is in the flowering stage, your plants will thrive with low humidity and a comfortable room temperature. If you plan on adding more CO2 to the grow room, the ideal temperature is below 28 degrees Celsius.

The lower temperatures provide encouragement for trichome-rich, potent buds you can enjoy and smell before burning. Do not go over a maximum temperature of 28 degrees Celsius because your bud growth will slow and the terpenes will evaporate. If your buds are especially hot at this time, the good stuff might be burning away as your plants grow. By the time you harvest, very little smell or taste will remain.

Be extremely careful, and make certain your plants are kept comfortable after the sixth or seventh week. Your terpene production reaches the maximum during this time and you do not want them to evaporate due to excessively high heat.
The length of the average day is 12 to 12.5 hours with an average temperature between 16 and 27 degrees Celsius. In the desert, the length of the average day is 12 to 12.5 hours with an average temperature between 18 and 33 degrees Celsius. Even though autumn is approaching, the temperatures remain relatively high. The growth season is coming to an end because the number of daylight hours is decreasing. If you still have plants that have not been harvested, you should do so now.The length of the average day is 11 to 11.5 hours with an average temperature between 13 and 23 degrees Celsius. In the desert, the average temperature is between 13 and 28 degrees Celsius. Autumn has officially arrived and the grow season is over. If your cannabis is still going, you need to harvest it now since the temperature can decrease suddenly and randomly.

If the weather turns wet or cold, you risk ruining your harvest due to bud rot. If you find bud rot, the entire bud must be removed immediately or it will spread to all of your other buds. This concludes the majority of the outdoor grow guide Australia.

Consider the Climates in Australia per Region

Australian CoastAustralian Top End
The entirety of the Australian coast does not have exactly the same climate. It is important to know your specific weather patterns and region. Always remember the importance of sunshine. Your plants will do well as long as they get enough sunlight.
The Top End includes the Northern Territory’s northern half and the surrounding areas in the northern portion of Australia. When compared to the semi-arid climate of central Australia or the Red Centre, the weather is unique. Most of Australia including the Red Centre has four different seasons. There are only two seasons in the Top End, the dry season and the wet season. The averages included in this article are based on two Northern Territory cities, Darwin and Katherine.
Australian Tropical Top End:
Warmth is never an issue for the tropical Top End. Despite this, sunlight is surprisingly uncommon. The daylight hours are much shorter for the Top End in comparison to the more arid southern areas of the country. This is the reason remaining aware of how many daylight hours are available for marijuana plants is important. Some growers prefer autoflowering strains because two sets of plants can be grown.

This is because the warmer temperatures enable the grow season to last longer and the plants are not photosensitive. The grow season and the wet season correspond. This is when the majority of the country is experiencing the summer months. In the Top End, your plants are at high risk for mold and mildew. You want to consider purchasing seeds from plants resistant to numerous issues including powdery mildew to start with. This decreases your risk.


Finding and Preparing Your Plot

Take a good look around the closest forest to find potential growing areas. The idea area has northern-facing slopes to provide your plants with sunlight during the day. To allow for green irrigation, there needs to be access to water. Since privacy is important, you should be able to easily move your plants from the grow area. Once you have located a site, you can increase your harvest by making certain you have everything necessary for your seedlings including:

10m2 fertilizer: organic, sulfide, manure
Lemon to ensure the soil is less tartish
Water sources
Hydraulic pump
Irrigation pipe

Lay out your lemon and fertilizer, making certain the distribution is even. During the first month, helping your plants grow by providing steady flood irrigation is critical. Consider installing a pipe framework connected to a water source. A water pump is often essential as well. Your cannabis will not grow to optimal capacity without fostering.

This requires enormous amounts of daylight and water for the vital development tiers. This is a good way to increase your harvest. If you want to see massive, green heads, this step is critical.

Germinating Seeds

Cannabis seeds do not require a lot to sprout. Your seeds do need to be placed on wet cotton wool. You should keep your seeds in a fairly dark area for three to seven days. After that, you can place them into seedling pots. Pack your pots with liquid fertilizer rich in nitrogen. Your seeds need to be buried 1/4 inch deep to place them in daylight. Water your seeds every morning and afternoon.

After roughly three weeks, the development of your plants is sufficient enough to place them in your chosen area. Once your plants have matured for a few months, you must be able to identify the male and female plants. Fifty percent of your plants will be male and must be discarded to ensure a good harvest. In the beginning, your male plants are important for sexual reproduction.


Reaping and Preserving Your Plants

Your plants will be ready for reaping after approximately four months. During this time, your produce can be cut down and spaced in a shaded plot for drying. Direct sunlight is not necessary to preserve your plants. Cut the heads off of your plants, then put them on a canvas to dry for a few days. During the night, your plants should be placed in a woodshed and covered.

You will be able to cure your weed in about a week. Completing this task efficiently will provide you with a larger and higher quality harvest. You need to put your buds into closed jars. If you have a significantly large harvest, your weed can be placed into a full drum. Your buds need to finish curing and be allowed to breathe occasionally. This process requires between four and eight weeks.

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