If the seed has sprouted and one half is still attached to the sprout, it can be planted and may grow, as long as the embryonic root and stem isn’t broken in the transplanting process. This occasionally happens with an avocado seed for example.
Nothing will happen because, in cutting the seed in half, you’ve also cut the baby plant-to-be in half as well.
Seeds are tiny miracles of life all wrapped up in a hard protective coating. That coating has to be hydrated, or exposed to water, to soften and encourage the seeds to produce the enzymes necessary for germination. The seed contains enough food to nourish the plant-to-be through the germination and sprouting process. After the seeds have sprouted, they need warmth and light to continue to thrive. Splitting a seed to produce two plants instead of one isn’t a good idea.
Broken seeds can be added to the compost bin or planted around growing vegetables and flowers. They won’t sprout, but they will add nutrients to the soil as they decay.
The seed will not sprout.
The most popular and easiest technique of germination is the paper towel method. In case you didn’t guess, it involves nothing more than a paper towel and the optional holding container.
With the root already exposed, the plant will grow into the soil faster and more efficiently. Plus, knowing how to germinate seeds can help you determine the viability of your seeds before you plant them. If you germinate a seed and it doesn’t crack, then you don’t waste the time of planting it only to find out later on that it’s unviable.
What is Germination?
Just keep the rockwool blocks wet with pH balanced water. With rockwool, you don’t have to transition your seedlings from a paper towel to the next medium. You can let your plants progress through early stages of vegetation before needing to transplant them to soil or whichever medium you are using.
You’ll then want to fold the paper towel over the seeds so they are completely covered. Now you can put the paper towel with the seeds wrapped within into a holding container if you’d like. Be careful with containers though, as a tight seal with no air flow can become a breeding ground for mold.
After you have the seeds wrapped up and in the container (or not), put them in a dark, warm place. A closet near a heating vent, under the bed, wherever there is little light while still staying warm, between 65 and 75 degrees Fahrenheit.
If you have only saved the seeds for a year and a half, they should not give you any problems. After this time period, even if you have stored them properly, germination may be more complicated because the older the seeds are, the harder their shells, so the water used to open them will take longer to penetrate them. Therefore, the first method to try to get the plant’s embryo to develop is to put your old seeds in a glass of water, with a few drops of hydrogen peroxide, for 24 hours. Hydrogen peroxide softens the shell and facilitates the water’s infiltration.
First, you have won half the battle if you were careful with the original storage. Seeds must be kept in a cool, dry place. Therefore, the best option is to store them in refrigerators at a temperature between 6 and 8 degrees Celsius, and with relative humidity levels between 20% and 30%. And sheltered from light, of course.
Hydration to trigger germination
If all else fails, there are still a few more aggressive tricks that should only be used when, after a few days, your seeds have failed to hatch and make their way into the world.
Because of this risk, there are growers who choose another way: germinating their seeds with the help of wet paper towels and dishes. If this method is chosen, you’ll have to grab a plate and place a soaked paper towel on it. After placing your cannabis seeds placed on top, with enough space between them, cover them with another damp paper towel. Although this method is widely used, some purist growers insist that you have to be very careful, because the towels used may contain chlorine and chemicals that could impede germination.
For those beginning with the glass of water, the second step would be to move the seeds, after 24 hours, to the wet paper towels. Germination normally takes between 48 and 72 hours, and, in the case of old seeds, can last up to 5 or 6 days, or even weeks. Therefore, transferring the seeds to wet paper gives you more peace of mind, as you are dealing with less water and, if they open, they will not quickly drown.