1 Gal. Castle Wall Blue Holly Shrub With Lustrous Foliage and Naturally Pyramidal Form

SKU: EGHY004
Regular price $29.95
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Description

Castle Wall is a compact pyramidal Holly bush with glossy blue-green leaves that give off a lustrous shine-year-round and is often planted along borders as a formal privacy hedge. No pruning is necessary for this Holly to attain its symmetrical pyramidal shape. The definition of low-maintenance, Castle Wall only requires the occasional bi-weekly watering after its first-year of becoming established. Castle Wall is a male holly that is known for its exceptional pollinating capabilities of other nearby Holly cultivars, such as Blue Princess and Dragon Lady. With Castle Wall planted nearby, these female cultivars will produce a noticeably increased abundance of bright red berries that add a pop of color, as well as attract birds, through the winter. The Castle Wall Blue Holly bush lives most comfortably in USDA Cold Hardiness Zones 5-8 and reaches a height of 8 ft. and width of 4 ft.

 

  • Compact blue holly
  • Works well for formal hedge or border plantings
  • Glossy blue-green leaves
  • Excellent pollinator of other holly shrubs

Frequently Asked Questions

How big will it get?

It varies a lot, from low groundcover junipers to arborvitae that can reach 30 feet or more, and this page lists the size for this plant. Plan for its full spread, not the size of the pot.

How far apart should I plant a hedge?

Set plants a little closer together than they'd spread on their own, measured center to center. For example, a shrub that spreads 4 feet wide goes about 3½ feet apart.

Why is it turning brown?

Some browning after planting or after a hard winter is common in young evergreens. Both come down to water: a root ball that dried out, or winter sun and wind pulling water from the leaves while the roots sit in frozen soil. Water deeply through fall until the ground freezes, and wait for spring growth before you trim, since buds under brown tips can still be alive. Mild winter bronzing on boxwood almost always greens up in spring. Narrow black streaks on green boxwood stems are different, so send us photos.

Is it deer resistant?

It depends on the plant. Deer seldom do serious damage to spruces, most junipers or boxwood. They browse arborvitae and yews heavily, especially in winter, and occasionally do serious damage to blue hollies and Japanese hollies like Sky Pencil. Where deer are common, a wire-mesh cage around a young plant stops browsing.

When can I trim it?

Most evergreens hold their shape with little or no trimming. If you do trim, skip late summer and fall, because cuts then push tender new growth that winter can burn. Take out winter-browned tips in spring, once new growth shows you what's alive.

Do I need a male holly for berries?

Yes, for female hollies. Blue Princess, Castle Spire and Red Beauty set their red berries only with a male holly nearby that blooms at the same time, such as Blue Boy or Castle Wall. One male can serve three to five females, planted within about 300 feet.

What does the gallon size mean?

It's the size of the nursery pot the plant ships in, not the plant's height. A 1-gallon plant ships in a 1-gallon pot. The plant itself varies by variety and by season.

It arrived wilted or dropped some leaves. Is it OK?

A few days in a dark box is stressful for a leafy plant, and some yellow or dropped leaves are common. Water it if the soil is dry, give it a few days in bright shade, then move it into more sun over a week or two. New leaves usually follow. If it looks damaged or unhealthy beyond a few leaves, contact us that day with photos.

How do I plant it?

Plant when the ground isn't frozen, and not during a heat wave. Loosen any roots circling the root ball, and set the top of the root ball level with the ground or slightly above it. Water it in well.

How often should I water it? The label says drought tolerant.

Check the soil every few days for the first few months, and water when the root ball is dry. A new shrub counts as established once its roots spread as wide as its branches, which usually takes at least two growing seasons. Until then, it depends on you for water, even if the label says drought tolerant.