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Uptight™ Boxwood

Buxus sinica var. insularis `ROBBUXUPT` (PP# 21,390)

Uptight™ Boxwood

Buxus sinica var. insularis `ROBBUXUPT` (PP# 21,390)

This product is currently out of stock and unavailable.


How are the heights measured?

All tree, and nothin' but the tree! We measure from the top of the soil to the top of the tree; the height of the container or the root system is never included in our measurements.

What is a gallon container?

Nursery containers come in a variety of different sizes, and old-school nursery slang has stuck. While the industry-standard terminology is to call the sizes "Gallon Containers", that doesn't exactly translate to the traditional liquid "gallon" size we think of. You'll find we carry young 1-gallons, up to more mature 7-gallons ranging anywhere from 6 inches to 6ft.

How does the delivery process work?

All of our orders ship via FedEx Ground! Once your order is placed online, our magic elves get right to work picking, staging, boxing and shipping your trees. Orders typically ship out within 2 business days. You will receive email notifications along the way on the progress of your order, as well as tracking information to track your plants all the way to their new home!

Why are some states excluded from shipping?

The short & sweet answer is: "United States Department of Agriculture Restrictions." Every state has their own unique USDA restrictions on which plants they allow to come into their state. While we wish we could serve everyone, it's for the safety of native species and helps prevent the spread of invasive disease & pests. We've gotta protect good ole' Mother Nature, after all.

About Me


The Uptight Boxwood lives up to its name – it is tight and dense in structure, even with little or no trimming, and it grows up, not out, different from most other boxwoods. This rapid-growing form of Korean boxwood is remarkable for naturally growing 5 to 7 feet tall and staying just 3 feet wide. In addition, it is hardy into zone 4, and shows no bronzing or browning at all at low temperatures that brown other well-known forms of Korean boxwood. Because it grows naturally upright, it is ideal for making those pyramids, cones and tear-drop shapes that add such wonderful accents to any garden. Its upright shape also means it is easy to grow a tall boxwood hedge in the shortest possible time.

  • Unique naturally upright form
  • Stays green through the coldest winter weather
  • Scented white flowers
  • Rapid growing and easily clipped
  • Pest free and deer resistant

Anything from full sun to light full shade will suit the Uptight Boxwood. It will grow in any kind of soil that is not regularly soaked in water. Once established it will tolerate normal periods of drought, but it benefits from a good supply of water and fertilizer, especially if you want to maximize its growth rate and strong green coloring. It is also free of any significant pests or diseases, and it is not even bothered by deer. This ‘always green’ variety is the best boxwood for upright specimens or taller hedges available, especially in cold, exposed areas.

Plant Hardiness Zones 4-8
Mature Width 2-3
Mature Height 5-7
Sun Needs Full Sun, Partial Sun, Shade
Zones 4-8

Boxwood is a long-time favorite with gardeners, used for low and medium-sized hedges, and of course for all those charming balls, pyramids, cones and other clipped forms. They can bring grace, elegance and permanence to any garden. Whether used for a completely formal look, or as valuable accents and edging in a more casual garden, they are indispensable. There great value lies not only in being easily clipped into dense forms, and in their small leaves that enhance the tight look, but also in their ‘always green’ look – fresh and bright in every season.

Sadly, in colder areas, that reliable green can easily be marred by winter bronzing and browning, making the plants look dull and less attractive. Secondly, the practical task of creating upright shapes can be slowed down a lot by the natural tendency of most boxwoods to grow outwards as much or more as they grow upwards. This means that pillars and cones can be harder and slower to make that round shapes. The Uptight Boxwood solves both of these problems.

The Uptight Boxwood is new to gardens, and it has created a sensation for its hardiness and unique growth pattern. At the Tree Center we have been fortunate enough to obtain some top-grade specimens, but we know that our limited supply will not last long. To take advantage of the upright growth and winter green of this special plant, order now, as we cannot guarantee to keep plants in stock.

Growing Uptight Boxwoods

The Uptight Boxwood is completely hardy throughout zones 4 and 5, never turning bronze in winter and keeping a perfect green color throughout the coldest parts of the year. Even in the coldest parts of zone 4 it will only show a little bronzing, and quickly return to full green with the first growth of spring. It even stays green in conditions when the Wintergreen Boxwood begins to bronze, and that variety is usually considered, as the name suggests, one of the best for areas with cold winters. As well, it grows naturally into an informal upright column that needs no trimming at all to be dense and a perfect accent.

Size and Appearance

It will grow 5 to 7 feet tall – easily big enough for any topiary needs. Yet it will stay no more than 3 feet wide, so all its energy goes into upwards growth. Very quickly you can create a substantial cone, pyramid or column, depending on your design needs and trimming skills. Not only that, this plant offers the quickest way yet to produce a taller boxwood hedge. Space the plants 18 or even 24 inches apart, and in a few years you can have a 5 foot hedge of beautiful, soft foliage with a very fine visual texture.

Planting Location

Choose a location anywhere from full sun to moderate shade for your Uptight Boxwood plants. They will grow in almost any soil that it is well-drained. Use an evergreen fertilizer regularly, as clipped plants need more nutrients than ones that grow without trimming. Although when established this plant is moderately drought-resistant, it will grow faster and sturdier with a good supply of water, especially during hot, dry periods and in the early growing seasons.

Pests and Deer

Oh, one other important thing – this plant is normally never eaten by deer, so you do not need to worry if your garden is visited in winter by those pesky critters. As an added bonus, this particular boxwood flowers more than many others do, with pink buds opening to tiny white flowers with a rich perfume. These are produced more on plants that are not clipped regularly.

History and Origins of the Uptight Boxwood

Korean Boxwood (Buxus sinica var. insularis) is a relative of the Japanese Boxwood. These tough Asian boxwoods grow where the European Boxwood that early settlers brought to America will not. In areas colder than zone 6 the leaves of European boxwood will turn an ugly bronzy color in winter and young growth or whole branches can easily die. The Asian boxwoods are a much better choice, but even they can bronze near the limits of their hardiness. Not the Uptight Boxwood, which was selected precisely for its persistent green coloring. It also grows well in warmer climates, so it makes a great choice even down into Florida and southern California – wherever you live this is the perfect boxwood wherever you need height and narrowness.

The Uptight Boxwood is a variety of the Korean Boxwood discovered in 1989 by Robert J. Roberson at his nursery in Grain Valley, Missouri. He spotted an unusual growth on one plant in a field of Wintergreen boxwood he was growing. He grew it separately and soon noticed how green it stayed through the winter, without any bronzing of the leaves, as happens in many other boxwood plants. After a decade of growing and testing the plant, he patented it and released it for the enjoyment of gardeners. Because of its special origin, this plant must be carefully reproduced from stem pieces taken from plants of the correct variety. You may see cheaper boxwood bushes available, but these will always be of uncertain origin, and they will certainly not be the unique and reliable Uptight Boxwood.

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Uptight™ Boxwood

Buxus sinica var. insularis `ROBBUXUPT` (PP# 21,390)