Another thing to consider, especially if you are a novice grower, is that indicas take less time to mature than sativas. Indicas are considered a hardier plant that can withstand more stress so they are more forgiving to novice growers who tend to make a few mistakes on their trial run.
Cannabis sativa plants will grow tall and thin. They take longer to mature than indica plants. Sativa plants tend to have bigger yields than indica plants. Indica plants are shorter and more bush-shaped and tend to produce fewer buds than sativa plants.
Seeds should be kept in a cool, dark, dry place. Do not expose seeds to sunlight or they may sprout. Do not expose seeds to moisture or they may sprout as well. Seeds should be stored at room temperature. Exposing the seeds to extreme cold or heat could damage the seed so that it can never be used.
Sativa, Indica, or Hybrid
Don’t get overwhelmed. There are a lot of options when it comes how to choose cannabis seeds! The best way to learn is just to get started.
So you’ve decided you want to grow cannabis. One of the most important and earliest decisions you’ll make is which seeds to use. A good seed contains the essential ingredients for a healthy, potent plant. Learning how to choose cannabis seeds doesn’t have to be complicated – learn the basic facts here.
Healthy marijuana seeds are dark brown, black, or some combination of both. We’d recommend you don’t use green seeds. Green seeds usually aren’t yet mature enough to sprout. Both bigger and smaller seeds will work. Indica seeds tend to be bigger-sized than sativa seeds. Another way indica and sativa seeds differ is in their patterns. Seeds that are brown and black are most likely indica, while the seeds that are a single color are generally sativa.
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The largest seeds are the best ones to grow. It is easier to pick the largest ones if there are several to compare side by side. Growers should look for the most symmetrical seed that is round or shaped slightly like a teardrop. Underdeveloped seeds are small and have an asymmetrical shape.
Many growers who have numerous marijuana seeds need to store them long term if they want to germinate them in the future. However, seeds need to be kept in specific conditions to remain viable. They should be stored in a cool, dark, and dry room, much like the environment in which growers dry their harvested marijuana.
Size & Shape
Another common way to germinate marijuana seeds is by wetting a folded paper towel or cotton pad and placing the seeds inside of it. It is important not to get the paper towel or cotton pad too wet or it could drown the seeds. Growers should check the seeds after a few days to see which have taken root.
A mature, high-quality marijuana seed has a hard shell that can withstand the pressure of being squeezed between two fingers. Poor quality seeds will disintegrate when squeezed. If this happens, the seed was weak or dead and would not have grown a viable plant if it germinated at all.
When growing marijuana, it is important to identify male plants as early as possible. Just one male plant can pollinate an entire field, so it is critical that male plants are removed before they develop pollen sacs. There are certain signs that a young marijuana plant is male, including the following:
This is the beauty of seeds—often, you can tell which plants or genetics will thrive right from the get-go. This will help you determine which plants you want to take cuttings from for clones or for breeding if you want to create a seed bank of your own.
But if the seed you found looks decent, you might as well germinate it and see what sprouts.
Germinating cannabis seeds doesn’t always go as planned. Some seeds will be duds. Others will be slow and take longer to sprout. But some will pop quickly and grow rapidly.
Most cannabis plants begin flowering when the amount of light they receive on a daily basis reduces. Outdoors, this happens when the sun starts setting earlier in the day as the season turns from summer to autumn. Indoor growers can control when a plant flowers by reducing the daily amount of light plants receive from 18 hours to 12 hours.
Within a week or so you should see a seedling begin to grow from the soil.
However, a type of cannabis called Cannabis ruderalis, which developed in extreme northern conditions without much sunlight, will begin flowering once the plant reaches a certain age—they automatically start flowering regardless of the amount of light they receive, hence the name “autoflower.”
If growing male and female cannabis seeds, they’ll start to show their sex organs, or “pre-flowers,” after 8-10 weeks from germination.