try to use a jiffy pot or a starter kit, i have 100% success rate with these methods : for example RQS :
https://www.royalqueenseeds.com/growing/322-starter-kit-feminized.html
Using the RQS Feminized Seed StartER Kit couldn’t be easier, simply follow these steps
Remove your seeds from their seed packet. Be sure not to push them out the back of the seed packet, as this may damage them. Instead, peel off the packet seal.
Take the tray of Easy Start pots out of their packet. You will find your sachet of Bacto under the packet’s sticker.
Measure out a litre of lukewarm water in a plastic tub – around 22-25 degrees Celsius – and add in the sachet of Bacto. Mix it up and allow it to dissolve. This will activate the microbial life in the Bacto, which will help your seedlings grow a strong root base.
Place your tray of easy start pots in the water, allowing them to soak some of it up.
While they are soaking, get your propagator ready by putting a layer of perlite into it.
Now take your tray of Easy Start pots and place them on the perlite. As the water leaves the pots, it will leave both the perlite and the pots moist.
Enlarge each if the hole of each pot to roughly 5-10 mm deep, this will ensure your cannabis seeds have all the room they need. A screwdriver or pencil can be good for this.
Place a seed in each hole. It doesn’t matter which way they go up; your seeds will naturally head towards the light as the root burrows down.
Now put the wall and lid of the propagator in place. Place the propagator somewhere indoors where it won’t get knocked or moved. It will now take 1-6 days for your seeds to germinate. It is essential you leave the seeds to do their thing. It may be hard to resist, but opening the lid and checking up on them can disturb the humidity and heat levels, damaging the chances of germination.
Once the seedlings have reached 2-3cm high, you can cut up the pots into individual squares, ready to be transplanted into their main growing medium.
but there are plenty of other starter kits out there, i use them for sure 😊 Hope this helps ! 🚀