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Best time to plant marijuana seeds in australia

Outdoor Grow Calendar Australia

Growing of weed outdoor is associated with multiple benefits like avoiding criminal penalties, quantity and quality yields, as well as a cut down on equipment expenses. Every weed grower should consider growing outdoor marijuana. With the help of the outdoor grow calendar, the process will be made more comfortable and fun.

The calendar will simply guide you on the entire growth period, show temperatures required, and average day lengths needed when growing weed outdoor. August through April is when the Australian growing season is estimated to run. The growth period may vary, though, due to specific situations or locations. This information gives insight to both the beginners and experienced weed growers.

Northern Australia Grow Calendar

These areas found near and within this Northern Territory mainly have a unique climate compared to the Central region of Australia. Unlike Central Australia, with four different seasons, this region experiences only two seasons: the dry and wet season. The averages used in this information are values based on two cities in Northern Australia, which are Darwin and Katherine.

Warmth is not an issue in this part of Australia, although sunlight is. The arid daylight hours are shorter compared to the Southern Australian regions, which have more hours. It is, therefore, vital to know the number of hours of light your plant can get. Growing strains that are non-photosensitive work better in this tropical season because it can be prolonged due to the available warmer temperatures.

Tropical grow season corresponds with the wet season since it is happening during the summer months. As such, cannabis plants are exposed to high risks of getting mold and mildew. Growers should consider and order seeds that are more resistant to the problems associated with the wet season, such as powdery mildew.

White Powdery Mildew can destroy the entire cannabis garden or crop. It is fungi that appear like gray or white powder on your marijuana plants. Northern Australia is prone to this fungi growth due to high humidity in the regions. The humidity in the region ranges between 70 and 80 percent. Powdery mildew ruins your entire bud when infected, which sums to a significant loss. The solution to this problem is to protect your marijuana plants from this fungi infection. The calendar runs as follows:


August is the perfect time to prepare yourself mentally for the growing season. You can do this by preparing your growing area and ordering seeds that are resistant to mold and mildew, preferably. Seedlings grow better in temperatures between 20 °C and 25 °C so, the next month is usually the best for planting due to its warmer temperatures.

Average Temperatures Average Daytime Hours
25°C to 35°C 12.5 to 13 hours


Your plants should now be growing in the vegetative phase. That means your marijuana is shooting outwards and upwards. Auto-flowering plants should begin flowering sometime this month.

Average Temperatures Average Daytime Hours
25°C to 34°C 13 hours

Northern Australian climate has high humidity in this month. The humidity puts your plants are at high risks of getting mildew and mold. By this time, your plants start developing pre-flowers, and you can identify which plants are male and remove them to prevent them from fertilizing with the females. Pollination reduces your yields.

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Average Temperatures Average Daytime Hours
24°C to 32°C 13 hours


Your auto-flowering plants have probably reached the harvesting time. You will, therefore, need to clip the buds and hang them to dry. The drying process might take up to ten days. If you bend a branch and it cracks, then it’s fully dry. The harvest time for regular marijuana is also nearing because the daylights have decreased by this time.

Average Temperatures Average Daytime Hours
24°C to 32°C 12 to 13 hours


It is an excellent time to harvest your cannabis plants. Some growers prefer to prolong growing their plants, but you choose whichever option works better for you.

Average Temperatures Average Daytime Hours
23 °C to 33 °C 11 to 12.5 hours


It is now time to harvest since the dry season is kicking in. There is still a possibility of bud rot due to humidity. Once you spot a spoiled bud in your plants, remove it immediately since it can quickly spread to the other plants. Hang your plants in a humid free room and dry them in a maximum period of 10 days.

Average Temperatures Average Daytime Hours
22 °C to 33 °C 11.5 to 12 hours

East, West South, and Central Coast Grow Calendar

Averages in these regions are based on Brisbane, Perth, and Melbourne. Hotter days are felt in Central Australia. The Southeastern part of Australia is wetter and colder than the remaining portion of the country. Central Australia is more tropical and dry than the Coast, which means growers need to water their plants adequately. The calendar in these regions is as follows:


The temperature in this month is relatively hot, and this makes it unfit for outdoor weed growing. It is the best time to cultivate and prepare your soil with compost manure.

Average Temperatures Average Daytime Hours
Coastline: 8°C to 18°C Coastline: 10.5 to 11.5 hours
Desert: 7°C to 23°C Desert: 11 to 11.5 hours


Frost’s risk has dropped by now in the warmer parts of the country. You should have bought your seeds already. Put your seeds on the windowsill to start sprouting and be sure the plant gets 12 hours’ daylight exposure per day to enhance maximum energy growth. Use artificial light if the daylight is below 12 hours.

Average Temperatures Average Daytime Hours
Coastline: 9°C to 20°C Coastline: 11.5 to 12.5 hours
Desert: 11°C to 27°C Desert: 11 to 12.5 hours


The amount of daylight increases in October, meaning your plant is guaranteed with maximum sunlight. If need be, start making clones from the mother plants.

Average Temperatures Average Daytime Hours
Coastline: 11°C to 22°C Coastline: 12.5 to 13.5 hours
Desert: 15°C to 32°C Desert: 12.5 to 13 hours


The summer season has already kicked in, and you can now bring your plant outside all night and day, not unless the temperatures fall below 15°C. You can plant auto-flowering seeds at this time and wait for harvest time in early February.

Average Temperatures Average Daytime Hours
Coastline: 13°C to 25°C Coastline: 13.5 to 14 hours
Desert: 18°C to 35°C Desert: 13 to 14 hours
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The number of daylight stops to increase this month. The vegetative phase keeps on growing. Auto-flowering weed plants begin flowering.

Average Temperatures Average Daytime Hours
Coastline: 15°C to 27°C Coastline: 14 hours
Desert: 20°C to 36°C Desert: 14 hours


The hottest months of the year are February and January. The flowering of natural marijuana plants begins during this period. You can identify the sex of the plant. It is advisable to remove the male plants to prevent pollination.

Average Temperatures Average Daytime Hours
Coastline: 13°C to 25°C Coastline: 14 hours
Desert: 23°C to 39°C Desert: 13.5 hours


After reaching the flowering stage, your plant can grow well at comfortable lower temperatures boosting healthy, trichome buds with a fantastic scent.

Average Temperatures Average Daytime Hours
Coastline: 17°C to 28°C Coastline: 13 hours
Desert: 22°C to 37°C Desert: 13 hours


Autumn spring is nearing, although the temperatures should remain relatively high. The growing season is almost ending since the daylight hours are dropping as a result. You can now start harvesting.

Average Temperatures Average Daytime Hours
Coastline: 13°C to 25°C Coastline: 12 to 12.5 hours
Desert: 18°C to 33°C Desert: 12 to 12.5 hours


April marks the end of the growing season. You should then have your plants and hang them to dry. Before drying them, isolate all the buds which are rotten to prevent spreading to the rest of the plants.

Average Temperatures Average Daytime Hours
Coastline: 13°C to 23°C Coastline: 11 to 11.5 hours
Desert: 18°C to 28°C Desert: 11 to 12 hours

From the above information, it is very evident that different regions in Australia vary in climate. Knowing the weather patterns of the area means you are in is the significant step to mastering the growing season that suits you best. Lastly, sunlight is a critical condition necessary during your marijuana plant growth.

When is the best time to plant cannabis outdoors?

A number of states now allow cannabis cultivation for adult use, and even more states allow cannabis cultivation for medical purposes.

The increase in cultivation reform has resulted in a rise in interest in growing cannabis among cannabis consumers.

Cultivating cannabis can be one of the most rewarding activities that a person can do, and with a pleasant reward at the end of all the hard work (assuming the cannabis is grown right).

If you are thinking about cultivating cannabis, one of the first things you will need to determine is whether to cultivate cannabis inside or outdoors.

Why cultivating cannabis outdoors can be better than growing indoors

Cultivating cannabis outside has the following advantages over cultivating cannabis indoors:

  • Reduced equipment costs
  • No increased electricity bill
  • Larger harvest
  • Lower carbon footprint
  • Often easier to incorporate organic cultivation methods
  • Cheaper nutrient/input costs

Growing cannabis indoors has its benefits too, but for people that want a lower maintenance garden, cultivating cannabis outside is the way to go.

An obvious question – when is the best time to plant cannabis outdoors?

One of the first things that a grower needs to determine when planning a sun-grown garden is when to put plants into the ground.

A one-size-fits-all approach does not work. A number of factors are involved:

  • What is the latitude of where the garden will be located
  • What is the altitude of where the garden will be located
  • What is the precipitation level where the garden will be located
  • What will the temperature be like while the plant is in the ground
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Ultimately what a grower needs to try to avoid is planting the plant(s) too early in the year, which could result in the plants dying due to the soil/air being too cold.

Also, the grower needs to avoid planting the plants too late in the season so to ensure that the plant(s) has enough time to go through a full growth cycle.

Generally speaking, you want to plant your plants in the ground outside in early to mid-May, similar to when it’s recommended to plant tomatoes.

Tomatoes do not grow exactly like cannabis, but for planting purposes, they are almost identical. With that being said, each part of the country is different.

A great resource to look up the recommended planting date for where you live is the Farmer’s Almanac.

Simply enter your location and it will tell you when is the best time to plant tomatoes outside, which can double as the date for when to plant your cannabis too.

Getting started ahead of time is key

If you are growing from seed, you will want to germinate the seeds at least 6-8 weeks before planting.

A way to cut down on the prep time is to use a clone if you are able to. Clones are often harder to find than seeds. Each route provides its own advantages.

Growers can get a head start by letting their plant grow indoors for a few weeks prior to putting them inside. This obviously requires a greenhouse or indoor garden.

By allowing your plant to grow in a controlled environment while the air and soil outside is warming up, you give your plant some additional growth time, resulting in a larger plant.

Other tips that can help

If you live in an area where the warm season is shorter than in other parts of the world, there are two tricks that can really help.

The first is growing your cannabis plant in a container rather than planting it into the ground.

This allows you to move your plant to the most favorable parts of your yard to get the most sunlight as the season goes along.

Putting your plant in a container also allows you to bring the plant in at night when the temperature drops below a desirable threshold.

The second tip is using a concept known as light deprivation, or ‘light dep.’ This method involves cutting back on the sunlight time that a plant receives by cover the plant up after 12 hours of sun.

It’s a tricky method that requires using a tarp over a greenhouse or building a box that can go over your plant.

When you first plant your cannabis plant outside, the amount of daylight at that time is usually around 14 hours.

As the season goes along, and your plant is big enough, you can cap the amount of light it is exposed to at 12 hours and your plant will start to bloom faster than it normally would, thereby helping your harvest come sooner.