How to germinate marijuana seeds

how long does it take marijuana seeds to germinate

A seed is a dormant plant waiting for the right conditions to germinate and prosper. In this post you will learn how to germinate marijuana seeds as effectively as possible, since in nature there is no cost in the seeds but in this case the seeds will have cost you part of your savings.

The seeds of cannabis or marijuana germinate (born) to the meeting in a suitable environment to properly thrive in the often nature occur in spring with damp soil starting to heat up with increasing hours of sun and the Earth’s tilt. Another fact to keep in mind is that they germinate within the earth, protected from light in a breathable area (with oxygen-rich air) and once they germinate they begin their rooting phase.

These conditions germination imitate you at home with different methods provided that controls the following parameters:

  • Moisture : Along with the heat, it activates the seed and softens the shell that protects it. Once germinated, it will be essential to survive.
  • Darkness : The roots are sensitive to light, so they must be in the dark if we want to guarantee their germination.
  • Heat : Along with humidity, it activates the seed indicating favorable conditions outside. It is important to keep it between 20 and 26oC.
  • Oxygen : it is important to open the germinator every day to renew the air and provide the necessary oxygen.


There are many methods of germinating marijuana seeds, from the simplest to the most complex, in this article we will show you the most common ones, which if carried out with a little care and love, are 100% effective.


how long for marijuana seeds to germinate

The germination napkins is the most recommended by our website for its great effectiveness, ease and low cost.

Necessary material:

– Absorbent kitchen paper.

– Two plates or an opaque plastic tupper with a lid.

– Water.

– Sprayer (optional)

– Seeds.

– Latex gloves.

* It is highly recommended to use latex gloves throughout the process, since they will avoid possible contagion of diseases, fungi or viruses to the seeds.

** This germination method can also be carried out with the Pro Germinator, which contains everything necessary for the germination of the seeds as well as a thermometer on the top of the germinator.

Steps to follow:

  • Place about 6-8 absorbent kitchen paper napkins on a plate (or alternatively in a tupper) and put warm water until the napkins are soaked. Drain the napkins so that they are moist but finally not soaked.
  • Put the seeds on the small napkin mattress, separated from each other so that when they germinate the roots do not wrap around each other and have to manipulate them to separate and transplant them. The less you touch with your hands the better.
  • Wet another 6-8 absorbent paper napkins, wring them out to remove excess water, and place on top of the seeds.
  • Place the second plate on the last napkins (or the top of the tupper) to ensure darkness. The lid can be closed completely or not, it depends on how fast the paper dries, which must be kept moist and dark until the last seed germinates. If you close the lid completely, open it every day to renew the air and check the evolution of the seeds.
  • Place the tupper in a warm place without direct light, keeping the temperature between 18 and 25oc. In our website we have verified that, especially in the cold time of the year, they germinate more quickly and efficiently by placing the germinator on small sources of heat such as rooters, on the top of the fridge (outside it) or under a lamp, which generate enough heat to stimulate germination but little to harm the seeds. * If you use a thermal blanket or heater, think that the seeds are napkins in a “container”, not in a pot with soil, the heat could be excessive.


Observe the process and keep the humidity. Observe the evolution of the seeds and the humidity of the paper, in case it feels dry, spray water until wet. The seeds do not always germinate at the same time, so we recommend transplanting them when the root (radicle) is between 1- 1.5cm. If the tupper is left for a long time, the radicle grows, complicating its handling; This initial root is very delicate against infections and wounds, so the use of latex gloves or plastic tweezers is highly recommended.

Transplant your seeds. You should water the soil and make a hole in the substrate or growing medium, from the depth of the root and place the seed with the root down, leaving the seed or the first two leaves (cotyledons) just protruding from the growing medium. The substrate ( soil or coconut ) or other growing media must also be moist (not soggy) until the plant has two pairs of leaves. It is true that we will also obtain faster growth by making short cycles of humidity and drought. During the beginning of the cultivation, although the pot should never be allowed to dry completely, simply water at the right time and quantity so as not to make the substrate remain humid all the time, it should perspire.

At our website we always recommend using root stimulants such  as the well-known Rhizotonic or the effective Rhizo Blast during the first weeks of growth since we plant the seeds, it greatly facilitates the development of the root system and with it the growth of plants. With a low consumption lighting of 4x55w we can light 1 square meter of young plants, it is not necessary to use sodium lamps during this process, since they generate more heat and you cannot work so close to the plants.


– Accessible and economic material.

– Germination can be tracked.

– You always have the seed located.

– The absorbent paper maintains moisture well, re-hydrates well and the root does not adhere to it, so it separates easily. (Neither toilet paper nor cotton is recommended.


– You have to manipulate the sprouted seed, this being one of the most fragile moments of the plant.


The jiffys  are tablets pressed peat that the wet expand. They are of different sizes, small ones are recommended. They are often used to root cuttings, but can also be used to germinate seeds.

Necessary material:

– Jiffies

– Water

– Seeds

– Mycorrhizae and tricodermas (optional)

Steps to follow:

  • Put the Jiffies in a bowl.
  • Prepare the water : Adjust the pH between 6.2-6.5 This is an ideal time to add mycorrhizae and trichodermas to the water, thus the jiffi will be inoculated, protecting and facilitating the development of the root.
  • Hydrate the Jiffi. Put the water already prepared, with the regulated pH (with or without mycorrhizae and trichoderma); You will see the jiffy get wet and start to swell. Once swollen, lightly squeeze with your hand to drain the excess water without pressing the peat inside.
  • Marijuana seeds sprouted in jiffys
  • Marijuana seeds sprouted in jiffys
  • Make a hole in the top of the jiffi using an elongated utensil such as a pen with a depth of 1.5 to 2 cm.
  • Place the seed in the hole and cover it a bit with your finger without pressing.
  • Place the tray with the jiffies in a warm place (18-25oc)
  • Keep the jiffy moist (not soggy) until the first two leaves called cotyledons sprout. The plant can be kept in the jiffy until the secondary roots begin to appear from the sides. This will be the time to transplant into a larger pot.


– Little manipulation of the seedling.

– Localized seed.

– Ease of transplant.


– Little breathability if there is excess humidity (little air).

– Germination cannot be tracked.

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