Atlantica cedars can be propagated from cuttings, seeds, or air layering.
From cuttings
- In late spring, select a healthy branch that is 6–8 inches long
- Use sharp shears to make a diagonal cut just below a node
- Remove the lower leaves to prevent rot
- Insert the cutting into a pot of sterile, well-draining soil
- Maintain humidity and keep the soil moist
- Transplant seedlings when they are 3–4 inches tall
From seeds
- In the fall, collect ripened cones from a mature tree
- Freeze the cones until the scales open
- Shake the seeds out of the cones onto a sheet of paper
- Soak the seeds in water overnight
- Plant the seeds in a tray of sandy seed starter mix, about 1/2 inch deep
- Place the tray in a sheltered outdoor location
- Keep the potting mix moist but not wet
- Transplant seedlings into individual pots when they are large enough to handle
From air layering
- Select a healthy branch on your tree
- Make two circular cuts around the branch, then connect them with a straight cut
- Remove the bark to expose the inner layer
- Wrap sphagnum moss around the exposed area and secure it with plastic wrap
- Check periodically and add water if needed
- Once roots are visible, cut the branch below the roots and pot the new tree