Contents

Why is a marijuana grow calendar important?

Marijuana grow calendar: Northern USA states

Marijuana grow calendar: Southern USA states

FAQs about marijuana grow calendars 

Timing is everything

 

Did you know that an outdoor grow calendar could be the key to whether or not your crop thrives? While cultivating cannabis outdoors is the most popular choice, many farmers often overlook the importance of the growing conditions.

Does your state experience longer warm seasons or more intense cold snaps? Using a marijuana grow calendar for your outdoor crop is ideal for helping you stay ahead of your plant’s requirements.

Join us to take a closer look at the outdoor cannabis grow calendar for Northern and Southern states. We’ll also reveal the best strains for the conditions in those areas, helping you plan for a successful harvest. 

Let’s dig in!

 

Why is a marijuana grow calendar important?

When growing cannabis indoors, you have full control over the cultivation conditions. If you time it all just right, you can force the plant to progress to the next stage in its lifecycle with the flip of a switch. 

Unfortunately, this isn’t the case with outdoor cultivation—leaving your crops at the mercy of the elements. This is when an outdoor cannabis grow calendar helps you keep track of the requirements and get the timing just right. 

When you start growing marijuana, the first thing to consider is that your chosen strain might not be compatible with the location. Whether using our outdoor cannabis grow calendar in Northern US or in the South, you’ll know what to expect each month.

Marijuana plants have specific requirements throughout their lifespan regarding soil, climate, and a cannabis feeding schedule. Allow our marijuana outdoor grow guide calendar to shed some light on the conditions for each month during the complete life cycle. 

 

Marijuana grow calendar: Northern USA states

Let’s kick this off with our outdoor cannabis grow calendar for Northern states. While the growing season doesn’t start until mid-May, there’s more than enough to do while you prepare. 

Remember that “if you fail to plan, you plan to fail.” Put the extra effort in now, and you’ll reap great rewards with a bountiful harvest. 

This section will cover the outdoor cannabis grow calendar for Northern US states, with averages referring to New York, Chicago, and Seattle. 

 

 

 

 

February

Average day length: 9.5–11.5 hours (8.5–10.5 hours in Alaska)

Average temperature: 22–51°F (-8–12°F in Alaska)

It may still be cold outside, but you can use this time to prepare for your pending crops. To dive into our outdoor cannabis grow calendar, let’s go shopping! Your required materials include:

  • Soil
  • Pots
  • Nutrients
  • Spray bottles and watering cans
  • Cannabis seeds

Due to its short growing time, many cultivators prefer using indica strains for their crops. 

If you live in an area that experiences longer frost and cold periods, opt to start your seeds indoors if you plan to clone. You can create ideal germination conditions by providing 18 hours of artificial light and maintaining temperatures between 68–77°F.

At this point in our outdoor grow calendar, we recommend that you start preparing the soil. Once the final bits of frost have cleared, you can aerate the soil by adding compost and worms. 

 

March

Average day length: 9.5–13 hours (10.5–13 hours in Alaska)

Average temperature: 31–54°F (0–24°F in Alaska)

As the temperatures warm up, this is the point in your outdoor grow calendar to buy your seeds if you haven’t already! If you’re planning on cloning, your mother plant should be ready as the end of this month draws near. 

For regular cultivation, you can start sprouting your seeds on the windowsill at the end of the month. Remember to keep an eye on the day length to ensure that your seedlings get enough sunlight. 

Since most of the country won’t receive much daylight during this time anyway, we recommend using a lamp to provide additional light. Just a few hours each day will prevent your plants from entering the flowering stage prematurely.

A bonus tip from our marijuana outdoor grow guide calendar: If you’re cultivating autoflowers and want more than one yield, start sprouting your first batch of seeds now. If you’re opting for a single harvest, then hold germination off for another month.

 

April

Average day length: 12.5–14.5 hours (13.5–15.5 hours in Alaska)

Average temperature: 35–62°F (24–45°F in Alaska)

As the longer days draw near, we’re reaching the flowering time of our outdoor grow calendar—when daylight reaches at least 14 hours, pack that grow lamp away as you won’t need it anytime soon. 

Closer to the end of the month, it’s time to move your plants outdoors. Put them in a container, allowing them to absorb natural light outside and be moved indoors at night. 

If you live in colder areas, ensure that the last of the frost has cleared before moving your cannabis plants outdoors. Your young plants won’t survive the cold, so if need be, wait the extra month to keep your plant safe. 

If you’re cloning, your mother plant is now ready for you to make clones. 

 

May

Average day length: 14–15.5 hours (15.5–17.5 hours in Alaska)

Average temperature: 52–72°F (40–61°F in Alaska)

Spring is in the air! The best part of any outdoor grow calendar starts around now. While the temperatures are warming up, be sure to keep a close eye out for the last few traces of frost. 

If you’re focusing on autoflower seeds, expect them to start sprouting in the second half of the month. Since some areas in the Midwest and Alaska experience three short months of warmer weather, you must act fast to harvest your crop at the end of August.

 

June

Average day length: 15–16 hours (8.5–10.5 hours in Alaska)

Average temperature: 22–51°F (-8–12°F in Alaska)

This is the most active time for the outdoor cannabis grow calendar in the Northern states as plants experience their most development. You’ll see that your autoflower plants start developing flowers if you look closely. 

 

July

Average day length: 14–16 hours (16.5–18 hours in Alaska)

Average temperature: 58–85°F (55–73°F in Alaska)

As the hottest month in your outdoor grow calendar, your autoflower plants start developing large flower clusters. If you’re cultivating a photoperiod crop, you’ll see pistils forming.

If you’ve chosen to use regular seeds and don’t plan to breed, watch out for signs of male plants. You’ll identify male plants by the flowerheads developing on the side of the branch. Females present as drop-shaped leaves with two prominent white pistils.

 

August

Average day length: 13–15 hours (14–16.5 hours in Alaska)

Average temperature: 58–84°F (49–66°F in Alaska)

Your beloved autoflower crop is now drawing to the end of its outdoor marijuana grow calendar. Harvest your crops by cutting the flower heads and hanging them in a dark space to dry for ten days at room temperature. If the branch cracks when you bend it, you’re good to go. 

Your photoperiod plants are now entering the flowering stage as most areas experience less than 14 hours of daylight. 

 

September

Average day length: 11.5–13.5 hours (11.5–14 hours in Alaska)

Average temperature: 54–76°F (38–55°F in Alaska)

As the outdoor cannabis grow calendar for Northern US draws to a close, you’ll find that photoperiod plants develop larger flower clusters

During the flowering phase, your plants are more susceptible to mold and mildew, which could destroy your crop. Take great care to keep your plants dry during this time. If you experience wet days, we recommend that you move your plants indoors or create a shelter to keep them dry. 

Be sure to provide a windbreaker, shelter, or bamboo support if your marijuana plants are exposed to strong winds. This will prevent unwanted damage to your precious crops.

 

October

Average day length: 10–13 hours (11.5–14 hours in Alaska)

Average temperature: 46–64°F (20–33°F in Alaska)

Many cultivators should take extra care during the final month of the outdoor cannabis grow calendar for Northern states. Growing in cold or wet regions can mean a particularly high risk of bud rot during this time. 

Pay close attention and be ready to harvest if you catch the slightest sign of bud rot. It’s far better to harvest early and have a diminished cannabis quality than lose an entire crop. 

 

Marijuana grow calendar: Southern USA states

As we’ve shown in our outdoor cannabis grow calendar for Northern US states, taking the time to prepare for your harvest is the key to success

If you’re living in the Southern states, keep an eye on the frost, as this signifies the start of your outdoor grow calendar. The average temperatures covered in this section refer to Houston, Miami, and Los Angeles.