What is the best way to germinate cannabis seeds?
This article explains how to correctly germinate your cannabis seeds, covering everything from optimum temperatures, to potting your seedlings and transferring them outdoors (or inside under lights).
The best way to germinate cannabis seeds requires only two saucers or plates and some moist tissue. Here is a step by step guide.
Unfortunately, regulation and implementation in respect of cannabis seeds often differ from country to country. For this reason we advise you as a matter of urgency to make inquiries about the regulations to which you are subject. Read the complete disclaimer here.
Step 1. The setup – How to germinate cannabis seeds
Line the bottom of the first plate with a few layers of wet tissue and drain any excess water from the plate.
Seeds should be placed on top of the tissue, allowing each seed as much space as possible.
Place another few layers of moist tissue on top of the seeds, again allowing excess water to drain off.
Lastly, cover everything with the second plate, upside down, to form a ‘clam-shell’ shape – this will create the dark, moist environment necessary for germination.
Step 2. Germination – How to germinate cannabis seeds
Place the plates somewhere warm (21ºC) and away from direct light.
Check the seeds every day to ensure that the tissue does not dry out. Spray the tissues with water if necessary.
Within a few days some or all of the seeds should open and put out a root. It is common for cannabis seeds to open within 72 hours of being put in the germination medium. Less commonly, some seeds may need up to 10 days or even two weeks to open and put out a root.
When the first few millimetres of root have emerged from a germinated seed, each one should then be carefully transferred to a small container of growing medium (soil, coco-fibre or rockwool).
Step 3. Potting – How to germinate cannabis seeds
Make a hole in the growing medium that is about twice as deep as the seed is long, so that each germinated cannabis seed sits 2-5mm below the surface.
Place the cannabis seed, root first, into the hole and cover with a small amount of growing medium – just enough to block light, not enough to obstruct the seedling when it emerges.
Cannabis seedlings usually emerge from the growing medium 24 to 72 hours after the germinated seeds are planted.
Step 4. The seedling stage – How to germinate cannabis seeds
New seedlings should be given access to bright light from the time they emerge. Care should be exercised in the first week or two, as seedlings are still quite delicate.
Seedlings intended for outdoors should be acclimatised to direct sunlight by placing them on a windowsill inside the house and increasing their exposure to direct sunlight by an hour or two per day.
Seedlings intended for indoors may emerge into an artificially lit environment with no problems. If using HID lighting, seedlings should be kept a minimum distance of 50 to 80cm from the bulb. If using fluorescent light, seedlings can be kept a normal distance from the tube/bulb.
The best way to germinate cannabis seeds requires only two saucers or plates and some moist tissue. Here is a step by step guide. Find out the best way to germinate seeds, only on Sensi Seeds.
How To Germinate Cannabis Hemp Seeds
Store your seeds air tight and moisture free in your refrigerator till you’re ready to germinate. Most seeds should keep for 2-3 years. Powerful varieties and fresh seeds commonly germinate in 3-5 days. When seeds have been stored refrigerated it can take up to 7 days for them to sprout. Soak the seed in water for a few hours then place them between layers of moist tissue in a covered tray.
Follow these simple guidelines for a successful germination by using:
- A dark environment and stable room temperature
- A tray with plenty of ventilation (frequent fresh air)
- Distilled water for soaking and early watering
- Tissue paper (without prints) and a saucer/tray
Patience “budding beginner”. Check on your seeds frequently, as you should never let them dry out. Spray luke-warm distilled water on them as often as necessary to keep them moist. Your reward? A tiny white root breaking through the nut shell! From here you wait until the root is about 1-2 cm long before you give them there first taste of soil if you are growing them bio style. For more details on different growing mediums, see the article on page 112 of The Smokers Guide to Amsterdam!
Important: don’t ever use fertilizers or root stimulants while germinating and moisten the tissue paper, never soak it with too much water.
Now that the root is the right length, you should place it in the soil with the root pointing down, so that the seed shell is level with the soil surface. Gently cover it with soil taking care to not damage the seed. Fluorescent light or even indirect daylight is strong enough for the seeds to become a small plant. From there on, it’s easy to see why we call it weed; it wants to grow!
For budding beginners, here’s the basic S-Guide to seed germination. Check out a good grow book (like the one featured on page 109 of The Smokers Guide to Amsterdam) to learn more.