Horticulture Unlimited Inc.

Plant Guide

Grand Canyon Century Plant
Grand Canyon Century Plant

Agave phillipsiana

This bluish-green to deep green agave grows to three feet high and wide with serrated teeth along its edges and looks similar to Agave americana. It sometimes produces offsets for reproduction. This agave develops a ten-…

Green Cloud
Green Cloud

Leucophyllum frutescens ‘Green Cloud’

Green Cloud™ is a trademarked variety of <em>Leucophyllum frutescens</em>with larger leaves and darker flower color than its close relatives. It has an upright, spreading form that can reach 8 feet tall by 8 feet across.…

Green Feathery Cassia
Green Feathery Cassia

Cassia nemophila (Senna artemisioides filifolia)

Green Feathery cassia is an evergreen shrub that grows four to six feet tall and wide. The shape is rounded and dense. It has leaves that are narrowly pinnate, forming feathery sprays of silvery foliage. Its showy yellow…

Green Spoon
Green Spoon

Dasylirion acrotrichum

Green spoon is an excellent accent plant that blends well with many other desert shrubs and ground covers. It can be used in all zones of a landscape, looking right at home in the mini-oasis as well as the dry zone. This…

Guajillo Tree
Guajillo Tree

Acacia berlandieri

Guajillo is a small, spreading tree that grows to 12 feet tall by 12 feet wide. It is very shrub-like but can be trained into a small accent tree. Naturally multi-trunked, it is evergreen in the low elevation zones and b…

Hairy Green Aloe
Hairy Green Aloe

Aloe tomentosa

This aloe gets its name from its unique greenish-white flowers that are covered in thick wool. Its species name, tomentosa, means dense wool. The plant forms a large, solitary rosette to two feet tall and about four feet…

Halliana
Halliana

Lonicera japonica

The dense, vigorous evergreen or semi-deciduous vine has twining stems and climbs fifteen to thirty feet tall to cover a large area quickly with its sprawling branches and dense foliage. It has deep green, medium-sized,…

Hartweg Evening Primrose
Hartweg Evening Primrose

Calylophus hartwegii subsp. fendleri

This fast-growing, bushy, perennial with linear, green foliage and showy flowers grows one foot high and two inches wide. During the spring and early summer, it develops small, yellow, buttercup-like blossoms. The flower…

Havard’s Century Plant
Havard’s Century Plant

Agave havardiana

The striking plant has silvery blue to bluish-gray, spiny, wide foliage, tapering to a tip. The teeth are larger towards the upper end of the leaf and are smaller towards the lower end. It grows to two to three feet tall…

Hearts and Flowers
Hearts and Flowers

Aptenia cordifolia

Hearts and Flowers <em>(Aptenia cordifolia)</em> is a fast growing, perennial succulent commonly used as a ground cover. This sprawling plant forms a dense mat that spreads in 3-foot wide clumps reaching a height of 6 to…

Honey Mesquite
Honey Mesquite

Prosopis glandulosa

Honey mesquite is a willow-like, deciduous tree with an open, spreading crown and low growing, twisted branches. It reaches heights of thirty-five feet with a thirty- to forty-foot spread. The tree has a delicate leaf ca…

Hop Bush
Hop Bush

Dodonaea viscosa

Hop Bush (also known as Hopseed Bush) is a drought-tolerant shrub with an upright, branching form. It reaches a height of 12 feet with a 10 foot spread. Its willow-like leaves are 4 inches long. The foliage is a bronzy-g…

Ice Plant
Ice Plant

Drosanthemum speciosum ‘rosea’

Ice Plant mixes well with other desert-adapted plants either as a filler in containers or as a ground cover. It forms a dense mat of sparkling leaves and brilliant colored flowers. The small, pill-shaped leaves have tiny…

Indian Fig
Indian Fig

Opuntia ficus indica

This immense, branching cactus with a massive trunk grows to fifteen feet tall and ten feet wide. It produces large, oblong pads that are either spineless, or have a few spines. The cup-shaped blossoms appear in late spr…

Jacaranda
Jacaranda

Jacaranda mimosifolia

This magnificent, tropical beauty grows twenty-five to forty feet with an equal spread. Its tall canopy has an open, irregular shape and usually develops multiple trunks. Jacaranda produces soft, delicate, velvety, fernl…

Jade Plant
Jade Plant

Crassula ovata

Jade plant is noted for its interesting green, oval-shaped succulent foliage that grows out from a multi-branching trunk. The shrub can grow as tall as twelve feet in its native habitat of South Africa. However, in the S…

Jerusalem Sage
Jerusalem Sage

Phlomis fruticosa

Jerusalem sage is a fast-growing, warm-season plant that reaches three to four feet tall with an equal spread. The semi-woody evergreen plant has fuzzy, grayish-green, textured leaves and bright yellow, wooly blossoms in…

Joshua Tree
Joshua Tree

Yucca brevifolia

This magnificent, slow-growing plant is the largest of all the yucca species, reaching thirty feet or more in height with a fifteen-foot spread. The species is an important wildlife plant in its natural environment. Nati…

Lady Slipper Plant
Lady Slipper Plant

Euphorbia macrocarpus

The attractive, slow-growing succulent is recognized by its bright red flowers that resemble an elegant shoe or slipper. The plant grows six feet tall and wide in a clumping, upright growth habit, with small pencil-like…

Lemon Dalea
Lemon Dalea

Dalea capitata

The sprawling, aromatic plant grows eight inches tall and three feet wide with lush, fine-textured, light green foliage and small, yellow flowers. It is fast-growing and forms a mound of dense foliage that makes it a gre…