Pollination Information for Green Vase Zelkova (Zelkova serrata 'Green Vase')

Green Vase Zelkova trees are primarily pollinated by the wind. These trees are monoecious, meaning they have separate male and female flowers on the same tree. The male flowers produce pollen while the female flowers contain the ovules needed for fertilization.

The pollen is carried by the wind to the female flowers, where it fertilizes the ovules and allows the tree to produce seeds. Because Green Vase Zelkovas are wind-pollinated, they do not rely on insect pollinators such as bees, butterflies, or moths.

To ensure successful pollination and seed production, it is important to plant multiple Green Vase Zelkova trees within close proximity to each other.

Green Vase Zelkova trees typically bloom in the spring, with the male flowers producing pollen before the female flowers are receptive. The female flowers will then become receptive to pollen a few weeks later.

Green Vase Zelkova (Zelkova serrata 'Green Vase') FAQ

What is a Green Vase Zelkova?

A Green Vase Zelkova (Zelkova serrata 'Green Vase') is a deciduous tree that belongs to the Ulmaceae family. It is known for its classic vase-shaped growth habit, making it a popular shade tree for parks and large lawns. It is also known for its green foliage that turns red, orange or yellow in the fall.

How tall does it grow?

A Green Vase Zelkova can grow up to 50 feet tall and 30 feet wide at maturity. It has an upright, spreading form that creates a shade canopy.

What are its soil and sunlight requirements?

The Green Vase Zelkova grows best in well-drained soil and full sun. It can also tolerate partial shade, but its fall color may not be as vibrant. It is also adaptable to a range of soil pH levels and can tolerate urban pollution.

When does it bloom and what do the flowers look like?

The Green Vase Zelkova blooms in early spring, usually between March and April. Its flowers are small and inconspicuous, with greenish-yellow petals.

What kind of maintenance does it require?

The Green Vase Zelkova requires minimal maintenance once established. It is tolerant of drought and frost, but should be watered regularly during extended dry periods. It can also benefit from occasional pruning to remove dead or damaged branches, and to maintain its shape.

Is it susceptible to any diseases or pests?

The Green Vase Zelkova is generally resistant to most pests and diseases. However, it can be susceptible to Dutch elm disease, so it is best to avoid planting it near other elm trees or infected wood. It may also attract Japanese beetles in some areas.

Can it be grown in containers or indoors?

The Green Vase Zelkova is not typically grown in containers or indoors, as it requires ample space to grow and develop its roots. It is best suited for large landscapes, parks, and commercial areas.

When is the best time to plant?

The best time to plant a Green Vase Zelkova is in the fall or early spring, when the tree is dormant and temperatures are mild. This allows the roots to establish before the onset of summer or winter stress.

Planting & Care for Green Vase Zelkova (Zelkova serrata 'Green Vase')

Planting

• Plant in full sun for best growth, but can tolerate partial shade.
• Choose a well-draining, acidic soil with a pH between 5.5 and 7.5.
• Plant in a hole 2-3 times wider than the root ball, and as deep as the root ball.
• Backfill with soil and water thoroughly.
• Apply a layer of mulch around the base of the tree to retain moisture, but keep mulch away from the trunk.

Care

• Water deeply and regularly, especially during periods of drought.
• Prune in late winter or early spring to maintain shape and remove any dead or diseased branches.
• Fertilize in early spring with a slow-release, balanced fertilizer.
• Watch for pests such as Japanese beetles and scale insects, and treat as needed.
• Monitor for signs of disease such as leaf spot and canker, and treat as needed.