Autoflower CBD Primer Guide

Growing Preferences for High CBD Cannabis

Growing Preferences for High CBD Cannabis

Day neutral hemp, scientifically known as C. ruderalis or colloquially referred to as “autoflowering” hemp, prefers long, dry, and sunny days. During establishment, autoflower hemp requires regular watering to maintain even moisture. The soil should never drop below 50% of capacity, and on hot days (above 80° F) should stay above 80% for optimal establishment.

Early applications of a balanced vegetative feeding program are critical to developing a well branched, large hemp plant. The goal is to create as many flowering sites as possible within 3-5 weeks of growth, at which point the autoflower cannabis plants will begin to show signs of flowering. At this time it is best to maintain a strong vegetative feeding program and begin to slowly introduce more phosphorus, potassium, and micronutrients to prepare for the hemp plants reproductive (flowering) phase. The plants should continue to grow quickly and stack up flower sites from weeks 3-8. During Weeks 8-12 the flowering sites will bulk up and become dense, especially at the very end of the cycle. It is important to let the autoflower cannabis plants finish and fully mature before harvesting in order to maximize the biomass yield and cannabidiol content of the crop.

Plants that grow during the summer when the days are long, warm and sunny will ripen and be ready to harvest quickly. In the winter, the shorter and colder days with less light can add anywhere between an extra 10-20 days of time to harvest. Autoflowering cannabis plants have a strong appetite for light! The more light they receive, the faster they grow and come to maturity. True autoflowering plants can come to maturity even under a 24 hour daytime light cycle (no darkness/night). Weak, low watt lighting typically used to keep clone plants “vegging” will not speed up the growth of autoflower plants nor prevent them from flowering.

One of the most important parts of growing day-neutral hemp varieties is to minimize transplant-  shock. Any shock resulting from improper transplanting, can significantly contribute to reduced yields. Unlike other agricultural crops, especially vegetables and flowers, autoflowering hemp varieties want to be transplanted as fast as equipment and handling will allow for, or within 10 days of emergence. Please see our propagation guide for more information.

Days to Seed Emergence:

2 – 5

Days to Flower:

21 – 35

Days to Maturity:

68 (Summer) – 95 (Winter)

Days to Seed Emergence:

2 – 5

Days to Flower:

21 – 35

Days to Maturity:

68 (Summer) – 95 (Winter)

Best Times to Plant Autoflowering High CBD Cannabis

Best Times to Plant Autoflowering High CBD Cannabis

  • Fully Outdoors: Plant feminized hemp seed(ling)s immediately after last frost date or-12 weeks before first frost date
    • Can use remay when they are young to protect in an emergency but its not ideal
  • Under Hoops: Plant autoflowering cannabis 2 weeks before last frost date or – 8 weeks before first frost date
    • Can use remay when they are young to protect in an emergency but its not ideal
  • Night time lows above 45° F
  • Soil temps above 64° F

Transplanting

Transplanting

Recommended Plants Per Acre or Square Feet:

  • Acre – 11,000-18,000 plants
  • 10,000 Square Feet – 3,400 – 4,600 plants

Common Plant Spacing

  • Field Planted (spacing is based on center to center -> tractor wheel spacing)
    • 1 row on a 30’’ bed
      • 12’’ apart in row -> 17,424 plants per acre
      • 16’’ apart in a row -> 13,068 plants per acre
      • 18” apart in a row -> 11,606 plants per acre
    • 3 rows on a 60’’ bed
      • 12’’ apart in row -> 26,136 plants per acre
      • 18’’ apart in row -> 17,424 plants per acre
    • 2 rows on a 60’’ bed
      • 12’’ a part in row -> 17,424 plants per acre
      • 16’’ a part in a row -> 13,068 plants per acre
      • 18” a part in a row -> 11,606 plants per acre
    • Raised Garden bed or greenhouse planted in pots
      • 18’’ on center (offset planting)
      • On a 100’ X 5’ bed that would be ~ 222 plants

Per Acre Yields

Total Autoflowering Feminized Cannabis Flower Biomass

Below Average: 1500 lbs/acre
Average: 2150 lbs/acre
Above Average: 3000 lbs

 

What is the typical total biomass yield per cannabis plant?

The typical yield per plant is about 2 – 4 oz of biomass.

What percent of my cannabis crop will I be able to trim?

Depending on several factors, you will be able to trim about 25-50% of your cannabis crop. These factors include:

  • Variety
  • Time of year planted
  • Overall growing conditions
  • Harvest timing

What percent CBD do your autoflower varieties have?

Autoflowering cannabis varieties typically range between 6 -12% of CBD.

Currently, our catalog contains ratios between 22:1 and  – 27:1.

Per Acre Yields

Total Flower Biomass

Below Average: 1500 lbs/acre
Average: 2150 lbs/acre
Above Average: 3000 lbs

What is the typical total biomass yield per plant?

2 – 4 oz

What percent of my crop will I be able to trim?

25-50% depending on several factors

  • Variety
  • Time of year planted
  • Overall growing conditions
  • Harvest timing

What percent CBD do your autoflower varieties have?

Between 6 -12% CBD.
Our current catalog contains ratios between 22 – 27:1.

What is the difference in how Autoflower and normal clone varieties grow?

Autoflower genetics varieties initiate their reproductive (flowering) phase of growth regardless of daylength. Clonally propagated varieties are short day cannabis plants that require 12 hours of  darkness to initiate their reproductive (flowering) phase.

 

How long does it take for autoflower cannabis plants to come to harvest from seed?

Our autoflower cannabis varieties take approximately 68 to 95 days depending on the variety of time of year. Generally, during the summer months when higher light intensity is available, the crops finish faster. During the shoulder seasons in the early spring and late fall it usually takes an extra 10 – 20 days for the crop to come to full maturity. However, during the heart of the growing season the autoflower cannabis crop takes about 75 days to finish.

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Rest easy. Whether you’re outdoors or in a cannabis nursery, the Atlas Seed Autoflower CBD Primer Guide will help to ensure that all precautionary measures are taken to begin growing brilliant hemp and cannabis plants from seed to harvest. Share your name and email to gain exclusive access to this helpful guide!

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