Pollination Information for American Pillar Arborvitae

American Pillar Arborvitae (Thuja occidentalis 'American Pillar') is a coniferous tree species that is wind-pollinated. This means that it does not rely on insects or other animals to transfer pollen from male to female flowers, but instead relies on the movement of air to do so.

The male flowers of the American Pillar Arborvitae produce pollen in the form of tiny, lightweight grains that can be easily carried by the wind. These grains are released from the male flowers in the spring and travel through the air until they reach the female flowers. Once they reach the female flowers, the pollen grains settle on the stigma, fertilizing the ovules and allowing the tree to produce seeds.

Because American Pillar Arborvitae is wind-pollinated, it does not require any specific pollinators to reproduce. However, it is important to note that planting multiple trees in close proximity to one another can increase the likelihood of successful pollination and seed production.

American Pillar Arborvitae (Thuja occidentalis 'American Pillar') FAQ

What is an American Pillar Arborvitae?

The American Pillar Arborvitae (Thuja occidentalis 'American Pillar') is a columnar evergreen tree that grows up to 25 feet tall and 5 feet wide at maturity. It is a popular landscape plant due to its compact size and attractive, dense foliage.

How do I plant an American Pillar Arborvitae?

Choose a well-drained location with full sun to partial shade. Dig a hole twice the width of the root ball and deep enough to accommodate the roots. Backfill with soil, tamp down firmly, and water deeply. Mulch around the base of the tree to retain soil moisture and prevent weed growth.

What soil conditions are best for American Pillar Arborvitae?

Well-drained soil that is slightly acidic to neutral is ideal for American Pillar Arborvitae. If the soil is poorly drained, amend with organic matter such as compost to improve drainage.

How often should I water my American Pillar Arborvitae?

Water deeply once a week during the growing season, especially during periods of drought. Do not overwater as this can lead to root rot and other plant diseases.

How do I fertilize my American Pillar Arborvitae?

Apply a slow-release, balanced fertilizer in early spring before new growth emerges. Follow package instructions for application rates and method. Avoid fertilizing in late summer or fall as this can stimulate new growth that may not have time to harden off before winter.

How do I prune my American Pillar Arborvitae?

Prune lightly in early spring to remove any dead or diseased branches. Avoid heavy pruning as this can damage the tree and affect its shape.

Is the American Pillar Arborvitae deer-resistant?

Yes, the American Pillar Arborvitae is considered deer-resistant due to its fragrant and prickly foliage.

What are some common pests and diseases of American Pillar Arborvitae?

Common pests include bagworms, spider mites, and aphids. Common diseases include cedar apple rust, root rot, and canker disease. Proper cultural practices such as watering and fertilizing correctly can help prevent many pest and disease problems.

When do American Pillar Arborvitae produce cones?

American Pillar Arborvitae produce cones in the fall, but they are not typically conspicuous.

Planting American Pillar Arborvitae

American Pillar Arborvitae can be planted in either late fall or early spring when the ground is not frozen.

• Choose a planting site that receives full sun to partial shade.
• Make sure the soil is well-drained and not too damp.
• Dig a hole that is twice as wide and just as deep as the root ball.
• Remove the plant from its container and loosen any roots that are tightly wound.
• Place the plant into the hole and fill in with soil, making sure the top of the root ball is level with the soil surface.
• Water thoroughly to settle the soil around the roots.

Caring for American Pillar Arborvitae

• Water the plant regularly, especially during the first year after planting.
• Apply a layer of mulch around the base of the plant to help retain moisture and suppress weeds.
• Fertilize once a year in the spring with a balanced, slow-release fertilizer.
• Prune only as needed to maintain a desired shape or size, as excessive pruning can damage the plant.
• Monitor for pests and diseases, and treat as necessary.