Planting Cannabis Seeds: How Deep Should You Go? (2024)

FAQs

How deep in the soil should cannabis seeds be planted? ›

Cannabis seeds come in various sizes, and the general rule of thumb is to plant them at a depth of 1/4 to 1/2 inch (0.6 to 1.3 cm). Smaller seeds may require a shallower planting depth, while larger seeds can be planted slightly deeper.

How many seeds does it take to grow weed? For some growers it's a simple one-seed-per plant rule that applies. For others, a couple of extra cannabis seeds are often germinated. It's a personal decision by the grower based on their experience and their specific grow situation.

The plants need at least sixteen hours of light during the seedling stage, but eighteen is best with six hours of darkness. During the seedling stage, the LED blue light spectrum is preferred. Moist soil, high humidity, and eighteen hours of the LED blue light spectrum will ensure the rapid growth of cannabis.

How big should cannabis plants be after 2 weeks? The height or size of a plant is a measuring stick that growers typically use to determine if the plant is healthy. The size of the plant at the two-week mark is a common indicator used. Plants are commonly about 2 or 3 inches tall after two weeks.

If you have don't have the packet, a good rule of thumb is to plant the seeds at a depth equal to twice their width or diameter (depending on seed shape). A pencil is a handy tool to make a hole and determine the correct depth. You can measure the point of the pencil ahead of time to denote a quarter or half inch.

Seeds too close to the surface absorb moisture but are at risk of dying because roots cannot reach moisture quickly enough to sustain the germination and seedling growth. Deeper seeding can reduce stand density and plant vigor because of the inability of the coleoptile to reach the surface.

Temperature for Germination

Different strains may have slightly different temperature preferences, but a general temperature range of 70 to 85 degrees Fahrenheit (21 to 29 degrees Celsius) is considered ideal for most cannabis varieties.

As per watering frequency, cannabis plants, especially young, require watering every two to three days, a little less often in the germination and seedling stages when the water usage is lower.

Big marijuana seeds usually have more energy and potential to mature fast and even produce a more fruitful harvest. You can also tell the quality of cannabis seeds by looking at their specific shapes. Pick different seeds and compare them side to side. High-quality seeds should be symmetrical or have a teardrop shape.

Cannabis seeds need no light when they are germinating.

In fact, they require an absence of light. All of the methods below call for darkness. Once they have sprouted, they will need a lot of light—18 hours a day, to be exact (though you could even give them 24 hours of light per day).

What should a 2 week old cannabis plant look like? ›

Many growers consider the first 2-3 weeks after germination to be the cannabis seedling stage. These are the first couple of weeks where the seedling is most vulnerable. The seedling may only be a few inches/cm tall with a couple of sets of true (non-cotyledon) leaves.

Indoor growers need to be careful while using high-intensity growing lights. Too much light stress can lead to permanent damage to your plants.

Just plant your seeds 1/2 inch to one inch deep in soil or another medium that has been moistened. A key benefit of this technique is that your seedlings won't be subject to transplant shock. Because they have grown up in their surroundings, they will have acclimated to them.

This season, it is very important to control planting soil depth and seedbed. Good seed depth--1.5 to 2.0 inches or even deeper--is recommended in dry conditions to ensure good moisture availability for successful seed germination.

Seedling Stage: The Best Conditions for Cannabis Seedlings. In nature, cannabis plants are typically found in warm, sunny, and humid conditions with a light breeze to grow strong, resilient stems. Mimic those conditions using a propagator, a light, and a household fan, and set your seedlings up for success!

Seeds generally are planted at a depth of two times the diameter or width of the seed. As an example, consider a seed that is 1/8 inch thick. This seed would be planted approximately 1/4 inch deep. Place tiny seeds on the surface of the soil and cover them lightly with vermiculite or soil.

Under most conditions, the optimum seeding depth for small grains is 1.5 to 2 inches. Aim to place the seed in a zone with ample moisture, but shallow enough so the crop can quickly emerge. Adjusting and monitoring your seeding depth is critical.

Good seed depth--1.5 to 2.0 inches or even deeper--is recommended in dry conditions to ensure good moisture availability for successful seed germination.

The rule of thumb is to plant seeds at a depth equal to two or three times their width. It is better to plant seeds too shallow than too deep. Some seeds, such as certain Lettuces or Snapdragon, need light to germinate and should not be covered at all.