From a midsummer sowing you can expect true fern fronds by winter, but autumn sowings may take until the following spring. After one to two years the young ferns will be large enough to plant out in the garden.

How big does holly fern grow?

Also known as Japanese holly fern, this substantial plant reaches mature heights of 2 feet (0.5 m.) with a spread of about 3 feet (1 m.). Holly fern works well as a border plant or a ground cover.

How far apart do you plant holly ferns?

Dig a planting hole for each holly fern division. Make the holes just wide and deep enough to accommodate the rootball. Space them 18 to 24 inches apart.