Materials: Paper-towels (at least 2 sheets), 2 plates/dishes (or similar object), warm water.
Often growers will find their tiny seedlings begin to exhibit purple stems.
No worries – A seedling’s purple stem doesn’t necessarily indicate an unhealthy plant. Purple Stems could be a result of plant genetics, if this is the reason, you are to expect a purple stem throughout the entire life of the plant. It must be noted that purple stems aren’t a dominant trait, and are rarely genetically induced.
A baby sprout with a purple stem is almost always 100% natural. Young seedlings are still adjusting to their environment and may be slightly lacking in a nutrient. If this is the case, healthy plants will regain their green/greenishbrown color within a few days to a week or two tops.
If you have ruled out the possibilities of genetics and the seedlings adjustments to life, you should begin looking for a nutrient deficiency. Purple stems are commonly caused by a Phosphorous (P) or Magnesium deficiency, if there is a Phosphorous deficiency you may also notice symptoms such as brittle leaves or greyish spots. To assist the uptake of Phosphorous (as well as most other nutrients) you should ensure the pH is slightly acidic– 6.0 will suffice.
How Long Will it Take?
Once you have decided that it is time to use your seed to grow a plant, you will have to initiate plant growth by germinating the seed. During germination moisture, heat, and air activate hormones within the durable outer coating of the seeds. Soon, the seeds outer protective coating will crack and the root (a tiny white sprout) is pushed downward outside. Next, seed leaves emerge out from within the shell as they search upward in search of light. Soon after a seedling is formed. Regular mineralized spring water contains all the nutrients a seed needs in order to germinate properly. Once the seeds sprout fertilizer is then added 2-4 weeks later.
To help you out, here are the high times top seed banks
Step 5. Now place these cubes with seeds in a tray on top of a heat pad if you’ve got one. Keep the temperature between 75-80°F (24-27°C) for optimum germination. Some strains may prefer it warmer, but this is the temperature for the majority of strains. Place a clear cover over the tray so you are creating a humidity tent. This retains much needed moisture.
Step 6. At least once a day, check the moisture of the rockwool cubes. If they need more, apply purified water with a spray bottle. Keep the cubes damp, but not drenched.
Step 7. When you see the plant just penetrate the surface of the rockwool gently remove the seed shell from the recently germinated embryo.
That’s all there is to it! Good luck.
The Method: The paper-towel method involves placing the seed(s) onto a damp paper-towel (which is placed on a plate/dish, or similar object), and covering them with another damp paper-towel. Boil some water and run it all over the plate to kill any bacteria or germs. Run some boiling hot water over the paper towel also, but make sure it doesn’t fall apart. Then squeeze the paper towel until it is damp but not dripping wet with water.
It is imperative that you use water that is warmer than room-temperature. This will compensate for any drop in temperature. Next, cover the plate/dish with another plate/dish/bowl (to prevent heat from escaping, as well as protect the seeds from light). The bowl should cover the paper towel so that no sunlight gets in.
Also, using more than one sheet of paper-towel above and below the seed(s) will yield better results, as well as adding more warm water to the papertoweling/bottom dish before covering the whole arrangement with the optional second plate/dish/bowl.
WARNING: It is imperative that the seeds are removed from the paper-toweling as soon as the taproots have emerged. If the seeds are
left to soak for too long, delicate micro-roots can be torn when the seeds are removed from the paper-towel, which will temporarily
retard germination/growth as well as stress the plant (which could possibly result in an unfavorable male or a dreaded hermaphrodite).
WARNING X2: NEVER LET THE SEEDS DRY OUT. Water the cloth and keep it moist. Let the excess water drain away freely and keep it in the dark. The cloth will retain enough moisture to germinate the seed in a few days or so. If fungal attacks are a concern you can water with a mild two-percent fungicide or bleach solution.
In nature, a marijuana seed will germinate in the soil and emerge with its taproot growing into the earth. Therefore, you can plant cannabis seeds straight into your growing medium of choice. The main benefit here is that you don’t have to worry about ‘shocking’ the seedling while transporting it.
For the first few days, use a spray bottle to water the seeds, because adding too much water can drown them. It is worth investing in a pH meter to test the soil regularly and make sure it has enough moisture. If all goes well, the seed should sprout from the earth within a week. If it hasn’t sprouted within ten days, it will probably die.
The main downside with this germination method is that such plugs are generally available in packs of 50. Waste is inevitable if you only plan on planting a few cannabis seeds. The plugs dry out in a week or so and become unusable.
EDITOR’S CHOICE – ILoveGrowingMarijuana
When buying seeds, opt for mature options with a dark brown appearance and a firm feel. Once you have them in your possession, make plenty of space for them to grow and thrive. Learning how to germinate weed seeds correctly is crucial to enjoying years of healthy plants and fruitful harvests. In this guide, we outline the ideal germination conditions and show you five different methods.
Always opt for dark cannabis seeds as they are the most likely to germinate when kept in the right conditions. White or pale-green seeds have little or no chance of growing.
It is a simple method, but also a risky one. You could damage the taproot while moving the sprouted seeds, or else the paper could dry out and kill the seeds. In any case, here is the process:
Once the right conditions occur, the taproot starts burrowing through the shell of the seed.
All you need is a nail file or a piece of sandpaper. Use the file or sandpaper across the surface of the seed in question. You do not need to use an immense amount of force, but instead, a few good scrapes to scar the seed’s outer shell will do.
However, if the marijuana seed is saturated with water, it will eventually absorb the moisture and kick-off the germination process.
Cannabis seeds, like all seeds, must undergo the germination process before it can grow into a weed-yielding beauty.
How to Germinate Old Cannabis Seeds
In other words, light green to pale white seeds are immature and are likely unviable. Therefore, always make sure that your cannabis seeds are light to dark brown color before germination.
However, they may be overkill if you utilize them during hot days, such as those during the summer months. Alternatively, they are essential during colder months during the winter. Therefore, you can choose to harness a seedling heat mat based on the time of year that you choose to germinate marijuana seeds.
Label the dinner plate with the name of the cannabis strain of choice.
The point of seed scarification is to allow water to penetrate the seed coating easily. By doing so, the embryo receives a jump start that initiates the germination process.