How to Germinate Cannabis Seeds
How to germinate cannabis seeds. We recommend that you follow these steps to ensure healthy sprouts and maximize your germination guarantee.
- Make sure you have all materials ready before starting each step of the process.
- It’s essential to keep seeds in a dark environment during germination and to limit their exposure to light to under one minute while preparing for planting.
Step 1: Gather the equipment to germinate for the Paper Towel method with Soaking. You will need the following:
- Clean small glass
- Small plate
- Paper towel, (free of dyes & perfumes)
- Distilled or Bottled water
Step 2: Fill a clean glass with room-temperature distilled or bottled water with a pH level between 5.5 and 6.5. Place your cannabis seeds into the glass of water and let the seeds soak for 12-24 hours in total darkness. The ideal temperature for germination is between 71-78°F (21-25°C). Do not soak the seeds for more than 24 hours.
Step 3: After 12- 24 hours, fold several pieces of paper towel and place it onto the plate. Pour the entire contents of the cup (water and cannabis seeds) onto the paper towel and drain off the excess water. Position the seeds about an inch apart on the paper towel. Gently cover the seeds with another moist paper towel and place the plate in a warm dark area. Check the seeds regularly and do not let the paper towel dry out.
Step 4: Place the plate in a warm dark place. Be sure to check on the seeds every few hours to ensure the paper towel stays moist. Do not let the paper towel dry out. Allow up to 7 days for the seeds to germinate.
*Many issues arise from not rewetting your paper towl during the germination process.
Step 5: Once the tap root has reached approximately ½ inch in length (1-2 cm) carefully transfer the seeds into your growing medium. Plant root side down approximately ½ inch (1-2 cm) below the surface and gently cover. Water regularly using a spray bottle, ensuring the soil remains moist but not waterlogged until shoots emerge.
Step 6: After planting, it can take 1 to 2 weeks for the seedlings to emerge. Check your seedlings daily to ensure the soil stays moist.
Read our Germination Guarantee for full details on how we support successful sprouting and offer replacements when needed. How to germinate cannabis seeds successfully in the Usa. Our guarantee does not cover seeds germinated using alternative methods, such as soaking in water bottles, planting directly into soil, or any approach not outlined in our official guide.
How to Germinate Cannabis Seeds FAQs
Can you soak cannabis eeds for too long in water ?
Yes. If you soak your seeds in distilled water prior to germination (which is recommended), then you want to remove them before 24 hours. Any longer and the seeds will be unlikely to sprout a taproot.
Can you plant cannabis seeds directly in soil?
This practice is highly frowned upon by professional growers and seed banks growing guides. While some growers are using this method, it generally accepted that seeds have the highest success rate when they are soaked in water first and then put onto a damp paper towel and left in a warm dark area with plenty of humidity. Once a taproot forms, then planted into soil, taproot down. Planting directly in soil has intermittent results and often voids any germination guarantees from seed suppliers.
Does the water used in germination have to be distilled?
Yes, its better to use distilled water to start seeds as it removes impurities and reduces the chances of issues with the water affecting success.
Are heating pads recommended for germination?
Yes this step is recommended for intermediate to advanced growers. Placing the heating pad under a plastic dome to keep your plants in the optimal temperature and humidity.
How long should I keep seeds germinating on the paper towel?
Most taproots will form in the first 24 to 72 hours. Some strains and older seeds may take up to a week. Its very important to keep the towel wet and most issues arise from moisture or temperature issues in this stage.
What is the paper towel method of cannabis seed germination?
This method involves pre-soaking seeds for up to 24 hours in distilled water. Then placing the seeds on a wet paper towel and moving them to a warm dark space. Once a taproot forms, then transplanting them into a medium of your choice like soil or coco noir or living soil etc.
Are seed starters a good option for cannabis seeds?
No, most germination policies on cannabis seed supplier websites void the warranty if you use this method. While some growers have success, the probability of forming a taproot and develop into a healthy seedling is reduced when compared to the paper towel method.
What's the ideal temperature to germinate cannabis seeds.
The ideal temperature is 24° C to 27° C or 75° F to 80° F. (Vivosun, 2026)
