Squeeze Box® Inkberry Holly (Ilex glabra)

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Regular price $2099
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How Does Proven Winners® Measure Plant Sizes?

We list our plants by container size, which reflects the amount of soil and root growth each plant has when it ships. Actual plant height and width vary by variety and season, and many plants grow quickly as the weather warms.

To help you understand what to expect, refer to our size guide below. You can also find each plant’s approximate arrival size and mature size on its product page.

How Does Proven Winners® Measure Plant Sizes?

We list our plants by container size, which reflects the soil volume and root growth each plant has at shipping. Actual height and width vary by variety and season, and many plants grow quickly as temperatures warm.
 
For a quick reference, check the size guide below—you’ll also find each plant’s estimated arrival size and mature size on its product page.

How Does Proven Winners® Measure Plant Sizes?

We list our plants by container size, which reflects the soil volume and root growth each plant has at shipping. Actual height and width vary by variety and season, and many plants grow quickly as temperatures warm.
 
For a quick reference, check the size guide below—you’ll also find each plant’s estimated arrival size and mature size on its product page.

Plant Height By Container Size

This chart highlights the typical heights for each size category while also showing how container sizes compare, giving you a clear, straightforward way to understand plant size at arrival and choose the best fit for your gardening needs.

This chart shows typical plant heights and compares container sizes, helping you quickly understand arrival size and choose the best fit.

Plant height size guide chart consisting of eco+ grande, eco+ elite, Combination, Royale, 0.65 gallon, 1 gallon, 2 gallon

Soil Volume By Container Size

This chart shows the typical soil volume for each container size, listed in both imperial and metrics units for easy comparison.

Soil volume size guide chart consisting of eco+ grande, eco+ elite, Combination, Royale, 0.65 gallon, 1 gallon, 2 gallon
Supertunia Vista® Paradise Petunia and ColorBlaze® Strawberry Drop Coleus planted together in a garden

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Proven Winners® Perennials

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Orders placed before 11am ET will ship same day. Orders placed after 11am ET will ship next day. Annual orders ship Monday – Wednesday. Perennial, Shrub, and Hardgood orders ship Monday – Friday.
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Squeeze Box® opens the door to new possibilities in your landscape. As a male inkberry holly, it plays a key role in supporting berry production on female varieties like Gem Box® and Strongbox®, helping to create vibrant, wildlife-friendly plantings that birds will love.

But this plant is more than just a pollinator partner—it's a standout evergreen in its own right. With a naturally strict, upright pyramidal form and dense branching, Squeeze Box® offers year-round structure and elegance. Its fine, dark green foliage provides soft texture that contrasts beautifully with broader-leaved plants, enhancing visual balance and guiding the eye smoothly across the landscape.

Whether used as a companion plant or a refined accent, Squeeze Box® Inkberry Holly delivers both beauty and function—bringing harmony, movement, and ecological value to your garden design.

  • 4-6 feet tall and 2-3 feet wide at maturity
  • Hardy in zones 5-9, be sure to check your USDA zone to ensure success
  • Plant in part to full sun (4+ hours daily)
  • Space plants 2-3 feet apart for best results
  • Maintains glossy dark green foliage year-round
  • Resists deer
  • Great for borders, containers, hedges, edges, landscapes, mass planting or as a focal point
  • Native to North America, fall and winter interest, salt tolerant, foliage interest

Care: Fertilize with Proven Winners Continuous Release Plant Food in spring and mid summer. Little to no pruning is needed; remove select branches to shape or manage growth if necessary.

Pollination: This is a male variety that won't produce berries. Plant near a female varieties if you want berries.

Shipping Info:

  • Enjoy free shipping on orders over $175
  • Size at shipping varies by season, plant, and trimming schedules
    • Quart shrubs are 5-8" tall at shipment
    • 1-Gallon shrubs are 6-24" tall at shipment
  • Shrubs ship dormant November through April
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