Wet the filter (not too much) and place it in a sandwich bag with a bit of air.
Put the bag in the fridge and wait 4 weeks.
When the time is up, place the bag in a dark spot at room temperature.
The temperature gradient will make the seeds sprout.
After a few days, open the bag and look for sprouted seeds.
If you see some, take them out, we will plant them right now.
Put the bag back in the shade and check regularly for new seedlings.
PREPARE THE SOIL
Now is the time to put the seeds in the soil.
Prepare individual pots using standard potting soil. Sequoia seedlings require a wet but well drained soil. Humidity is a key factor to the success of growing your seedlings. If you ever let the soil dry a little too much, the seedlings will almost surely die. However, too much water and the base of the seedling will rot and the plant will fall to the ground.
To prevent moulds and fungal parasites, add some fungicide to the potting mix, stir and fill the pots. make a hole in the centre and place the already sprouted seed. Lightly water the soil.
The stem of your seedlings should soon make a r ed upside down U shape. The seed envelope will slowly rise up and fall when the first cotyledons start growing.
Seedlings can have from 3 to 5 cotyledons (first leaves). After a few days, you will see the first real leaves show up in the centre. If your seedlings made it that far, it usually means they are less likely to die from stem rot.
During this stage of development, the plants should be kept in the shade to prevent any desiccation.
After a few weeks, the plants will start to grow branches. This is an indicator that they are ready for a bit more sunlight. Slowly move your plants in a brighter environment but avoid direct sunlight.
When your plants have been acclimated to the sun, you can move them outside during the day. Be careful to always keep the soil humid.
When the plants are about 4 to 6" tall, it is better to take them out of their pot and grow them directly in the ground. This will ensure that they don't dry up and it will give space for the roots to spread.
Once you found a place large enough (a 10m radius is a good start) you can plant your sequoia at its definitive spot. Remember to add some slow release conifer fertilizer to boost the roots production during the following year.
If you have deer in your area, protect your young tree with chicken wire during the first years of growth as deer love to chew on buds and young stems in the spring.
PLEASE BE AWARE I DO NOT GROW THE SEEDS. I AM NOT A GARDENER.
ANY GERMINATION AND GROWING INSTRUCTIONS HAVE BEEN FOUND ONLINE AND REPRODUCED HERE FOR YOU TO GROW THE SEEDS, HOPEFULLY, SUCCESSFULLY.
I ALWAYS ADVISE YOU CONDUCT FURTHER RESEARCH AND GROWING INSTRUCTIONS BEFORE ATTEMPTING TO GERMINATE THE SEEDS FOR YOURSELF.
I AM HERE TO HELP AND WILL ANSWER ANY QUESTIONS BUT DO USE GOOGLE AS YOUR FIRST RESOURCE AS IT KNOWS FAR MORE THAN I DO.