Grow calendar Australia Eastern, Western, Southern and Central | Grow calendar Australia Top End
Grow calendar USA

The Australian grow season runs from August through April (give or take a few months, depending on your specific location and situation). This grow calendar will help you with your growing endeavors for the next 7-9 months. It includes averages for day lengths and temperatures to help you get a better idea of what you can expect.

This is an excellent way to help new (and old) growers know how to plan their grow season and best budget their time. Even though it feels early, it is important to start preparations for your grow season now. Happy growing!

A Few Notes:

• Averages are based on Melbourne, Perth, and Brisbane
• The hottest days are experienced in the desert or the interior of Australia
• The Southeastern tip of Australia (including Tasmania) is the temperate climate, meaning it is cooler and wetter than the rest of the country
• The main difference between the desert (central Australia) and the coast is the fact that it is hotter and dryer. This means growers should simply take care to water their outdoor plants more frequently and in higher quantities.

August

Average Day Length: 10 hours 32 minutes to 11 hours 23 minutes
Average Temperature: 46 to 65 degrees Fahrenheit

The Desert:
Average Day Length: 10 hours 50 minutes to 11 hours 31 minutes
Average Temperature: 44 to 74 degrees Fahrenheit

This is the perfect month for preparing for the future grow season. Especially in the warmer regions of the Australian coastline, the worst of the colder weather is soon to be history, and it’s time to prepare your grow area and your plants. It is unlike there will be any frost to worry about any more, meaning you can almost start growing in August.

For that reason, you should order your seeds and begin the germination process as soon as you can. Since the growing season can last for a while in most parts of Australia, a plant that has Sativa dominant genes should do just fine in an outdoor grow setting. Indicas don’t fare as well in the heat that is to come, so be sure you know what you’re getting when you research and order seeds.

Ideally, seedlings will grow somewhere between 68 and 77 degrees, so unless this month is unseasonably warm, it’s a good idea to start your seedlings indoors and then wait until the temperature rises consistently enough to bring them outside. If you are growing your plants exclusively outdoors, you had better wait a while. While you wait, prep your soil with compost and worms.

If you are planning on cloning, it’s a good idea to begin growing the mother plant this month (ideally indoors). That way you can take the cuttings when it is still early in the grow season.

September

Average Day Length: 11 hours 25 minutes to 12 hours 22 minutes
Average Temperature: 49 to 68 degrees Fahrenheit

The Desert:
Average Day Length: 11 hours 33 minutes to 12 hours 19 minutes
Average Temperature: 52 to 82 degrees Fahrenheit

The risk of frost has dropped even more, especially in the warmer parts of the country. If you haven’t already, you should definitely buy your seeds by now. If you already have them and are prepared with your soil and other necessities, you can safely put your young plants on the windowsill to begin sprouting them.

Keep a close eye on the hours of daylight, as young marijuana plants need a minimum of 12 hours per day in order to get enough energy to grow. If you’re in the earlier part of the month where the daylight is still under 12 hours, supplement the natural light with a grow lamp. This is crucial because it prevents your plants from flowering early (which would be a huge waste).

If you are growing a mother plant for cloning, be sure it is ready by the start of next month, so there’s enough time for the clones to grow outdoors over the next few months.

October

Average Day Length: 12 hours 24 minutes to 13 hours 22 minutes
Average Temperature: 52 to 73 degrees Fahrenheit

The Desert:
Average Day Length: 12 hours 21 minutes to 13 hours 8 minutes
Average Temperature: 59 to 90

If you are growing some of your plants on the windowsill, they won’t need any extra artificial light starting in October, as the amount of daylight is going up by quite a bit. Still, you are going to want your plants to receive the maximum amount of sunlight hours, so see if you can get at least 13 hours for your plants.

If the daily temperature is high enough (if you are living in the warmer parts of the country, for example), then you can remove your plants from the windowsill and place them outside instead. Once the daylight temperature rises to 70 degrees Fahrenheit, this can be done. That said, be sure to bring your plants back in at night, since the temperatures will still drop lower then.

If it applies to you, begin making your clones from the mother plant during October.

November

Average Day Length: 13 hours 24 minutes to 13 hours 46 minutes
Average Temperature: 57 to 77 degrees Fahrenheit

The Desert:
Average Day Length: 13 hours 9 minutes to 13 hours 44 minutes
Average Temperature: 66 to 95

Temperatures should finally be high enough that it feels like real spring — or even summer! During November it is now okay to bring your marijuana plants outside all day (and night).

If you are growing autoflowering seeds, you can plant them during November so that you will be able to harvest towards the beginning of February.

December

Average Day Length: 13 hours 47 minutes to 14 hours 16 minutes
Average Temperature: 60 to 81 degrees Fahrenheit

The Desert:
Average Day Length: 13 hours 45 minutes to 13 hours 51 minutes
Average Temperature: 69 to 97 degrees Fahrenheit

This is the last month that the number of daylight hours continues to increase. Starting in January, these hours are going to begin decreasing again. In other words, you can expect your marijuana plants to grow a huge amount during their vegetative phase this month. The growth should accelerate and accelerate. If you are growing autoflowering marijuana plants, flowers will start to show up.

January

Average Day Length: 14 hours 15 minutes to 13 hours 41 minutes
Average Temperature: 63 to 84 degrees Fahrenheit

The Desert:
Average Day Length: 13 hours 51 minutes to 13 hours 23 minutes
Average Temperature: 75 to 103 degrees Fahrenheit

January and February are the hottest months of the year, despite the fact that the hours of daylight decrease a bit. In January you can expect an autoflowering strain of marijuana to begin really flowering, producing large groups of flowers. Meanwhile, your “regular” (non-autoflowering) marijuana plants will start to form pistils.

January is an extremely important month for growers of marijuana from non-feminized (regular) seeds. If you bought regular seeds, you could expect about half of your plants to be male. They will start maturing a couple weeks before the females do, so as soon as you can identify them as male plants, you should remove and discard them.

To identify the males, keep an eye out for flower heads, which resemble little balls on a little stem. They generally develop along the bottoms of the flanking branches. Females can be identified from their sacs of pollen, which are teardrop shaped and have two white pistils coming out of them. Do not discard the females.

February

Average Day Length: 13 hours 39 minutes to 12 hours 49 minutes
Average Temperature: 63 to 84 degrees Fahrenheit

The Desert:
Average Day Length: 13 hours 22 minutes to 12 hours 41 minutes
Average Temperature: 72 to 99 degrees Fahrenheit

If you planted autoflowering marijuana plants back in November, it is likely time to harvest them now. Gently clip the buds off and hang them to dry — but be sure you do it slowly and carefully. They should dry at room temperature, taking about a week and a half. If a little piece of branch cracks when you try to bend it, the buds are dry enough.

Because the days have shortened, it is likely a good time to harvest your regular marijuana plants as well. Typically speaking, marijuana plants should be ideally harvested before the hours of daylight drops to 13 hours (which will likely occur during this month, depending on where you are living). For regions where the daylight is dropping faster or more dramatically, it is okay to bring your plants back inside and keep growing them there with grow lamps in order to get the best harvest you can.

March

Average Day Length: 12 hours 47 minutes to 11 hours 46 minutes
Average Temperature: 61 to 81 degrees Fahrenheit

The Desert:
Average Day Length: 12 hours 39 minutes to 11 hours 50 minutes
Average Temperature: 66 to 93 degrees Fahrenheit

Autumn is on its way, but the temperatures should still be relatively high. Nonetheless, the number of daylight hours are dropping so the grow season is fast reaching its conclusion. If your plants are still hanging on and you haven’t harvested them already, it is probably a good idea to do that now.

April

Average Day Length: 11 hours 44 minutes to 10 hours 50 minutes
Average Temperature: 56 to 75 degrees Fahrenheit

The Desert:
Average Day Length: 11 hours 48 minutes to 11 hours 5 minutes
Average Temperature: 57 to 84 degrees Fahrenheit

It is official: fall has arrived. April marks the definite end of the growing season. If somehow your plants are still going, harvest them now because the temperature could drop randomly and suddenly. If the weather gets cold or wet, then bud rot is a real risk (which would ruin your harvest). If you do discover bud rot, remove the entire bud immediately or else it will spread to the other buds.

While the entire Australian coast clearly does not have the exact same climate, the most important thing is to be aware of what your particular region and weather patterns are like. Keep in mind that sunshine is key: if your plants are getting enough sunlight, they should do just fine.

Grow calendar Australia Eastern, Western, Southern and Central | Grow calendar Australia Top End
Grow calendar USA

Top End, Australia

The Australian grow season runs from August through April (give or take a few months, depending on your specific location and situation). This grow calendar will help you with your growing endeavors for the next 7-9 months. It includes averages for day lengths and temperatures to help you get a better idea of what you can expect.

This is an excellent way to help new (and old) growers know how to plan their grow season and best budget their time. Even though it feels early, it is important to start preparations for your grow season now. Happy growing!

A Few Notes:

• Averages are based on Melbourne, Perth, and Brisbane
• The hottest days are experienced in the desert or the interior of Australia
• The Southeastern tip of Australia (including Tasmania) is the temperate climate, meaning it is cooler and wetter than the rest of the country
• The main difference between the desert (central Australia) and the coast is the fact that it is hotter and dryer. This means growers should simply take care to water their outdoor plants more frequently and in higher quantities.

August

Average Day Length: 10 hours 32 minutes to 11 hours 23 minutes
Average Temperature: 46 to 65 degrees Fahrenheit

The Desert:
Average Day Length: 10 hours 50 minutes to 11 hours 31 minutes
Average Temperature: 44 to 74 degrees Fahrenheit

This is the perfect month for preparing for the future grow season. Especially in the warmer regions of the Australian coastline, the worst of the colder weather is soon to be history, and it’s time to prepare your grow area and your plants. It is unlike there will be any frost to worry about any more, meaning you can almost start growing in August.

For that reason, you should order your seeds and begin the germination process as soon as you can. Since the growing season can last for a while in most parts of Australia, a plant that has Sativa dominant genes should do just fine in an outdoor grow setting. Indicas don’t fare as well in the heat that is to come, so be sure you know what you’re getting when you research and order seeds.

Ideally, seedlings will grow somewhere between 68 and 77 degrees, so unless this month is unseasonably warm, it’s a good idea to start your seedlings indoors and then wait until the temperature rises consistently enough to bring them outside. If you are growing your plants exclusively outdoors, you had better wait a while. While you wait, prep your soil with compost and worms.

If you are planning on cloning, it’s a good idea to begin growing the mother plant this month (ideally indoors). That way you can take the cuttings when it is still early in the grow season.

September

Average Day Length: 11 hours 25 minutes to 12 hours 22 minutes
Average Temperature: 49 to 68 degrees Fahrenheit

The Desert:
Average Day Length: 11 hours 33 minutes to 12 hours 19 minutes
Average Temperature: 52 to 82 degrees Fahrenheit

The risk of frost has dropped even more, especially in the warmer parts of the country. If you haven’t already, you should definitely buy your seeds by now. If you already have them and are prepared with your soil and other necessities, you can safely put your young plants on the windowsill to begin sprouting them.

Keep a close eye on the hours of daylight, as young marijuana plants need a minimum of 12 hours per day in order to get enough energy to grow. If you’re in the earlier part of the month where the daylight is still under 12 hours, supplement the natural light with a grow lamp. This is crucial because it prevents your plants from flowering early (which would be a huge waste).

If you are growing a mother plant for cloning, be sure it is ready by the start of next month, so there’s enough time for the clones to grow outdoors over the next few months.

October

Average Day Length: 12 hours 24 minutes to 13 hours 22 minutes
Average Temperature: 52 to 73 degrees Fahrenheit

The Desert:
Average Day Length: 12 hours 21 minutes to 13 hours 8 minutes
Average Temperature: 59 to 90

If you are growing some of your plants on the windowsill, they won’t need any extra artificial light starting in October, as the amount of daylight is going up by quite a bit. Still, you are going to want your plants to receive the maximum amount of sunlight hours, so see if you can get at least 13 hours for your plants.

If the daily temperature is high enough (if you are living in the warmer parts of the country, for example), then you can remove your plants from the windowsill and place them outside instead. Once the daylight temperature rises to 70 degrees Fahrenheit, this can be done. That said, be sure to bring your plants back in at night, since the temperatures will still drop lower then.

If it applies to you, begin making your clones from the mother plant during October.

November

Average Day Length: 13 hours 24 minutes to 13 hours 46 minutes
Average Temperature: 57 to 77 degrees Fahrenheit

The Desert:
Average Day Length: 13 hours 9 minutes to 13 hours 44 minutes
Average Temperature: 66 to 95

Temperatures should finally be high enough that it feels like real spring — or even summer! During November it is now okay to bring your marijuana plants outside all day (and night).

If you are growing autoflowering seeds, you can plant them during November so that you will be able to harvest towards the beginning of February.

December

Average Day Length: 13 hours 47 minutes to 14 hours 16 minutes
Average Temperature: 60 to 81 degrees Fahrenheit

The Desert:
Average Day Length: 13 hours 45 minutes to 13 hours 51 minutes
Average Temperature: 69 to 97 degrees Fahrenheit

This is the last month that the number of daylight hours continues to increase. Starting in January, these hours are going to begin decreasing again. In other words, you can expect your marijuana plants to grow a huge amount during their vegetative phase this month. The growth should accelerate and accelerate. If you are growing autoflowering marijuana plants, flowers will start to show up.

January

Average Day Length: 14 hours 15 minutes to 13 hours 41 minutes
Average Temperature: 63 to 84 degrees Fahrenheit

The Desert:
Average Day Length: 13 hours 51 minutes to 13 hours 23 minutes
Average Temperature: 75 to 103 degrees Fahrenheit

January and February are the hottest months of the year, despite the fact that the hours of daylight decrease a bit. In January you can expect an autoflowering strain of marijuana to begin really flowering, producing large groups of flowers. Meanwhile, your “regular” (non-autoflowering) marijuana plants will start to form pistils.

January is an extremely important month for growers of marijuana from non-feminized (regular) seeds. If you bought regular seeds, you could expect about half of your plants to be male. They will start maturing a couple weeks before the females do, so as soon as you can identify them as male plants, you should remove and discard them.

To identify the males, keep an eye out for flower heads, which resemble little balls on a little stem. They generally develop along the bottoms of the flanking branches. Females can be identified from their sacs of pollen, which are teardrop shaped and have two white pistils coming out of them. Do not discard the females.

February

Average Day Length: 13 hours 39 minutes to 12 hours 49 minutes
Average Temperature: 63 to 84 degrees Fahrenheit

The Desert:
Average Day Length: 13 hours 22 minutes to 12 hours 41 minutes
Average Temperature: 72 to 99 degrees Fahrenheit

If you planted autoflowering marijuana plants back in November, it is likely time to harvest them now. Gently clip the buds off and hang them to dry — but be sure you do it slowly and carefully. They should dry at room temperature, taking about a week and a half. If a little piece of branch cracks when you try to bend it, the buds are dry enough.

Because the days have shortened, it is likely a good time to harvest your regular marijuana plants as well. Typically speaking, marijuana plants should be ideally harvested before the hours of daylight drops to 13 hours (which will likely occur during this month, depending on where you are living). For regions where the daylight is dropping faster or more dramatically, it is okay to bring your plants back inside and keep growing them there with grow lamps in order to get the best harvest you can.

March

Average Day Length: 12 hours 47 minutes to 11 hours 46 minutes
Average Temperature: 61 to 81 degrees Fahrenheit

The Desert:
Average Day Length: 12 hours 39 minutes to 11 hours 50 minutes
Average Temperature: 66 to 93 degrees Fahrenheit

Autumn is on its way, but the temperatures should still be relatively high. Nonetheless, the number of daylight hours are dropping so the grow season is fast reaching its conclusion. If your plants are still hanging on and you haven’t harvested them already, it is probably a good idea to do that now.

April

Average Day Length: 11 hours 44 minutes to 10 hours 50 minutes
Average Temperature: 56 to 75 degrees Fahrenheit

The Desert:
Average Day Length: 11 hours 48 minutes to 11 hours 5 minutes
Average Temperature: 57 to 84 degrees Fahrenheit

It is official: fall has arrived. April marks the definite end of the growing season. If somehow your plants are still going, harvest them now because the temperature could drop randomly and suddenly. If the weather gets cold or wet, then bud rot is a real risk (which would ruin your harvest). If you do discover bud rot, remove the entire bud immediately or else it will spread to the other buds.

While the entire Australian coast clearly does not have the exact same climate, the most important thing is to be aware of what your particular region and weather patterns are like. Keep in mind that sunshine is key: if your plants are getting enough sunlight, they should do just fine.