Frequently Asked Questions

What is the best way to germinate cannabis seeds?

The best way to germinate cannabis seeds requires only two saucers or plates and some moist tissue. Here is a step by step guide.

Warning!
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.

A graphic depicting the process of germinating seeds. The first part of the image shows a bottom plate lined with wet tissue with seeds placed on top. Above the seeds hovers another wet tissue which drips water. To the left of the plate an orange arrow directs the hovering tissue downward. In the second image the seeds are blanketed by the tissue and a second plate is directed downward by an orange arrow.

 

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).

A graphic depicting a plate with seeds blanketed by two wet tissues on a plate. Three water droplet icons depict the amount used “21 °C” is written in blue letters and framed by two lines, and an double sided orange arrow points to a second plate indicated the first one should be covered. The second part of the image depicts the seeds germinated. A circle with an arrow directed towards one of the three seeds depicts its magnification, and a root emerging from the seed.

 

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.

 

A graphic showing two germinated seeds on a split image with long roots planted 5mm deep into either soil or mineral wool. Short orange arrows are above the soil, the mineral wool, and seeds, pointing downward, showing the seeds are planted root down.

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.

A graphic depicted a potted cannabis plant on a balcony ledge. A blue sky appears behind it. A depiction of the sun hangs in the sky. An double sided arrow points to the second part of the graphic which also future a cannabis plant in a purple pot. This one is indoors on a grey surface in front of grey wall.