Pollination Information for Dwarf Japanese Cedar (Cryptomeria japonica 'Globosa Nana')

The Dwarf Japanese Cedar (Cryptomeria japonica 'Globosa Nana') is a cultivated variety of the Japanese Cedar tree and is a popular ornamental plant due to its low-growing habit and interesting foliage.

However, the Dwarf Japanese Cedar is a dioecious plant, meaning that it has male and female reproductive organs on separate trees, and therefore requires cross-pollination to produce seeds and propagate.

The male tree produces small, brownish-red cones that release pollen in the late winter and early spring. The female tree produces larger, greenish-blue cones that contain ovules and are receptive to pollen during the same time period.

Therefore, for successful pollination and seed production, it is necessary to plant both male and female trees within close proximity to each other, so that the pollen can be carried by insects or wind to the female cones.

The Dwarf Japanese Cedar is also known to hybridize with other Cryptomeria japonica cultivars, which can result in interesting variations in foliage and growth habit, but may also affect the viability of the seeds produced.

Dwarf Japanese Cedar (Cryptomeria japonica 'Globosa Nana') - FAQ

What is a Dwarf Japanese Cedar?

A Dwarf Japanese Cedar is a slow-growing evergreen shrub that is native to Japan. It has a compact, round shape and can reach a maximum height of around 6-8 feet. It is a popular garden plant because of its attractive appearance and low maintenance needs.

What are the growing requirements for Dwarf Japanese Cedar?

Dwarf Japanese Cedar grows best in well-draining soil that is rich in organic matter. It prefers full sun or partial shade and is a hardy plant that tolerates a range of temperatures, from -10 to 40 degrees Fahrenheit. It is important to keep the soil regularly moist but not too wet, as overwatering can lead to root rot.

How do I plant Dwarf Japanese Cedar?

To plant Dwarf Japanese Cedar, dig a hole that is slightly wider than the root ball and about as deep as the container. Loosen the soil in the bottom of the hole and mix in some compost or other organic matter. Gently remove the plant from its container and place it in the hole, making sure that the top of the root ball is level with the soil surface. Backfill the hole with soil and water well.

How often should I water Dwarf Japanese Cedar?

Dwarf Japanese Cedar should be watered regularly, especially during hot and dry periods. It is important to keep the soil moist but not waterlogged, as excessive moisture can cause the roots to rot. Water deeply once a week or as needed, depending on the weather and soil conditions.

How often should I fertilize Dwarf Japanese Cedar?

Dwarf Japanese Cedar does not require heavy fertilization, but it can benefit from a light feeding in the spring. Use a balanced, slow-release fertilizer and apply according to the package instructions. Avoid fertilizing in the fall or winter, as this can promote new growth that may not have time to harden off before the cold weather arrives.

How do I prune Dwarf Japanese Cedar?

Dwarf Japanese Cedar does not require much pruning, but it can be shaped or trimmed back if desired. Prune in the late winter or early spring before new growth begins. Use sharp, clean tools and make cuts just above a growth node. Avoid cutting into bare wood, as this can damage the plant and promote disease.

How do I propagate Dwarf Japanese Cedar?

Dwarf Japanese Cedar can be propagated from cuttings taken in the summer or fall. Take a 4-6 inch cutting from a healthy branch and remove the lower leaves. Dip the cut end in rooting hormone and plant in a pot filled with a mixture of damp sand and peat moss. Place the pot in a bright but shaded location and keep the soil moist. The cutting should root in 2-3 weeks. Transplant to a larger pot or into the garden once the roots have filled the container.

Planting Dwarf Japanese Cedar

• Choose a location that receives full sun to partial shade.
• Ensure the soil is well-draining and slightly acidic.
• Dig a hole that is twice as wide and just as deep as the root ball.
• Carefully remove the plant from its container and gently loosen the roots.
• Place the plant in the hole and backfill with soil, gently tamping down as you go.
• Water thoroughly to settle the soil and remove any air pockets.
• Add a layer of mulch around the base of the plant to retain moisture and suppress weeds.

Caring for Dwarf Japanese Cedar

• Water regularly during the first growing season to establish a strong root system.
• After establishment, water deeply but infrequently, allowing the soil to dry out slightly between waterings.
• Fertilize in early spring with a balanced, slow-release fertilizer.
• Prune lightly in early spring to maintain shape and remove any dead or damaged branches.
• Protect from harsh winter winds and heavy snow with burlap or other protective coverings.
• Monitor for any pests or diseases and treat as needed.