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Letters Q And R Plants

The letters Q and R plants page has a total of 16 different varieties for you. There aren't many specimens that start with the letter Q. Let's not waste any time, so take it away Herbee.


The Quercus - Oak Oak family consists of over six hundred species. This genus is native to many sub-tropical and tropical regions. Many different regions are home to this genus, including Mexico, southeast Asia, Africa, North America, Europe, the Mediterranean region, China, and Canada.

Oak Leaf

There are many different varieties that will grow well in zones two through ten in the United States. These species can be evergreen, semi-evergreen and deciduous trees and shrubs. The leaves have a unique shape and are great mulch for acid loving plants.

Quercus range in height from three feet up to one hundred and twenty feet tall. These species love damp and well drained soil. This popular tree and shrub can take take full sun or partial shade, depending on the plant.

The Oak has a spreading and big root system and doesn't transplant very well. These species can live for a long time. It's great tree specimen for shade in a front or backyard.


There are over fifty species that make up the Rauvolfia - Quinine Tree family. This family is native to both northern and southern hemisphere tropical areas, and especially southern Africa.

The Quinine variety is the only specie native to South Africa. They will thrive in zones nine through twelve in the United States.

Many different parts of the tree have been and are still used for medicinal purposes. Rauvolfia specimens are fast growers and can mature up to forty feet.

The fragrant flowers have green and white tones and are followed by shiny black colored berries. Birds are attracted to the berries, and due to the location of these trees, monkeys also love the eating the berries.


Rhabdothamnus is a rare one specie family, native to New Zealand. The Rhabdothamnus is actually a member of the African Violet family.

The trunk and branches are slender. It's beautiful flowers are so popular to view. They can be found in New Zealand, and also in zones ten and eleven in the United States.

The flowers are tubular in stunning shades of orange and red tones. This plant is an evergreen shrub that likes partial shade and humus rich soil. It can be a frost hardy shrub and should be pruned often to produce a fuller plant.

The Rhabdothamnus is a wonderful specimen that grows about six feet high and wide. It's great in gardens and landscapes.


The Rhamnus - Buckhorn genus is made up of deciduous and evergreen shrubs.

The Buckhorn is native to a variety of different climates and will do well in zones seven through ten in the United States.

There are about one hundred and twenty five species in this family group.

The shrub loves well drained soil and will do well in full sun, but partial shade is best for hot areas. Some of the species have thorns and the leaves are jagged.

The flowers aren't noticeable, but the berries are popular with birds.

The maturity of the family can reach up to fifteen feet in height. It's a nice accent specimen for a landscape area.


There are nine species that make up the Rhaphiolepsis genus. This is one of my favorite shrubs to use in a variety of gardens and landscapes. These species are native to sub-tropical and tropical southeast Asia.

This family will grow well in zones seven through ten. These shrubs love full sun or partial shade and well drained soil.

This particular specimen is a great addition to your garden or landscape. Use the Rhaphiolepsis as an accent or focal point plant.

The Rhaphiolepsis is known in spring for its tiny clusters of white and pink flowers.

A coastal environment is an ideal area to grow these specimens. One variety, the Indian Hawthorn, is very popular in my zone seven. I have used this specimen around decks and patios and as great evergreen accents throughout a garden or landscape.


The Rhododendron is a very large family of over eight hundred species, and includes azaleas. It can be found in so many different geographic locations.

Many of the Rhododendron species are native to southern China, Himalayan region, Japan, southeast Asia, Australia and North America.

In the United States, many varieties will grow in zones five through ten. Also known as the Rhody this specimen grows wild in many mountainous areas.

This family is known for its brilliant colored flowers that appear in the late spring throughout the summer months.

With the many different color tones in the flowers, it makes a wonderful focal point in gardens and landscapes.

You can read more and see a few photos by following the Rhododendron link at the bottom of the page.


There are over two hundred species that make up the Rhus - Sumac family. The Sumac is native to Japan, China, and the United States.

These deciduous and evergreen shrubs, trees, and vines will do well in zones two through nine in the United States. The Sumac prefers a sunny location with fertile, well drained soil.

The family needs protection from strong winds. Some of these popular trees will mature up to twenty feet and some of the smaller varieties will reach only three feet.

Yellow to green toned clusters of flowers will appear in late spring into the summer months.

In late summer red colored berries appear. The tree can take the spotlight in the autumn months, as the leaves turn vibrant colors of orange and purple tones. It's another popular specimen for a wide variety of landscapes.


The Ribes - Currant genus is made up of around one hundred and fifty specimens. This family is a group of wonderful deciduous and evergreen, ornamental and fruit bearing, shrubs and trees.

The Currant is native to northern Europe and Russia, and will grow well in zones five through nine in the United States.

In late winter and early spring, clusters of yellow, pink, or red flowers appear. The berries are in colors of white, green, purple or black, and many are edible. These plants can be planted in masses to produce different colored berries.

They will thrive in rich, well drained soil and can take full sun or partial shade.

Some varieties will mature to ten feet tall and can spread up to eight feet. It's another great specimen group for gardens.


Richea is a rare family of twelve evergreen shrubs. They are native to Australia and are also large numbers in Tasmania. The leaves are a rich green color, and long and slender. The clusters of pink, white, yellow or cream tone flowers come to life in the summer months. You should deadhead the flowers after bloom time in the fall months.

The popular Richea will do well in ground gardens and also in container gardens, too. Richea needs a rich base humus and acid based soil. Protect it from full sun and strong winds. These shrubs are generally small in height, but a couple of the varieties can mature up to fifty feet. It's a very unique family.


There is only one specie that makes up the Ricinus - Caster Oil Plant family.

Native to Africa and southwestern Asia, this specie will grow in zones nine through eleven in the United States. The danger of this specie is that all parts of the plant are poisonous.

The rare aspect of this plant being poisonous is that the actual seed oil has been used medicinally in heat treatments.

Ricinus loves full sun and humus base, well drained soil. This is a fast growing tree-like shrub, and can mature up to twelve feet. The specie may need staking.

Herbee's Tip

Herbee Greenthumb

Herbee here. Make sure when you read about a poisonous plant, you keep the plant isolated from the environment, such as birds. Never have poisonous plants around children or pets. Take the responsibility for the safety of your family and pets, as well as nature, especially my family, bees! Thank You!


There are about twenty trees and shrubs that make up the Robinia family. They are native to the United States and can grow anywhere from zones three through ten.

This specie can take pollution and also grows in poor soil. The Robinia does need protection from the wind and also needs moist soil. The shrub varieties will mature to around six feet.

The larger trees, Black Locust, will grow up to eighty feet. tall. Fragrant flowers of lavender and pink tones appear in the summer months.

It's a great specimen in a city landscape, containers, or a focal point in a small garden. If you use the Robinia as a focal point, a good tip is to have evergreen specimens near by so there isn't a dead space during the winter months.


The Roldana family is made up of about forty eight members. They are annual and perennial sub-shrubs. The Roldana is native to Mexico and Central America.

Plow & Hearth

Roldana will grow well in zones nine through eleven in the United States. Most of these species will mature to around six feet tall.

Their stems are long and narrow and non-aroma clusters of yellow flowers gives this family a very unique look.


Rondeletia is a very unique and stunning family of around one hundred and forty species. The Rondeletia family is native to tropical America and the West Indies. There are only three of these family members that are commonly grown. Rondeletia grows well in zones ten and eleven in the United States.

In springtime, red, pink, yellow, and white flowers appear. These flowers contain a large amount of nectar with a small amount of aroma. The birds feast on them when in full bloom.

Hummingbirds are especially attracted to this family. Rondeletia prefers full sun to partial shade and well drained soil. They will thrive if organic material is added to the soil. This specie can be in containers if a good watering schedule is done throughout its growing period.


The aroma of roses in a garden or along a house create not only a great smell, but gives you a wide range of color.

Carpet Roses

This is one of the most widely known of the letters q and r plants. The Rosa - Rose family has one hundred and twenty five species and numerous hybrids. This genus is popular for growers to develop spectacular hybrids for our gardens and landscapes.

Most roses are deciduous, but there are some that are considered evergreens. However, even the evergreens lose some of their leaves in the colder months. In the United States several varieties will grow in zones three through eleven.

Many people think roses take a lot of work. Growers are developing new hybrids that are for the most part low maintenance and also create a wonderful look along foundations or a specific rose garden. This family generates some of the most spectacular display of colors as well as aroma.

Check out the link at the bottom of the page for a website that is all about roses.


There are over two hundred and fifty species in the Rubus genus. These climbers and shrubs are both deciduous and evergreen.

They are native to China, Europe, and the northern hemisphere. Many people know some of the varieties by their common names of Rocky Mountain Raspberry, and the Red Raspberry.

They will grow anywhere from zones four through nine in the United States. The raspberry loves full sun and well drained soil. They need to be pruned after fruit is gone.

Rubus emerge with small flowers of pink, white and purple tones and have a look of a rose. It's a great specimen for many different styles of landscape.


The Ruellia family is primarily in the tropical climates of America, but there are a few species in North America. There are around one hundred and forty members to this genus.

The flowers are red, pink, and blue and are usually in clusters of five. The Ruellia is big in the southern hemisphere, as this specie will take center stage during Christmas time.

The Ruellia will mature up to around six feet tall, and does well in zones ten through twelve in the United States.

They like dry conditions and full sun to partial shade. In colder climates, this family will do well indoors or in a greenhouse setting.


The last of Herbee's letters Q and R plants is Ruscus - Box Holly. There are only four species that make up this family. The Box Holly will grow in zones seven through ten in the United States.

The Ruscus is native to Northern Africa. This specie is grown for its fruit and foliage.

This family is low maintenance, and will do well in full sun to partial shade and poor soil conditions. Although this specie has no aroma, the fruit and foliage make up for that.

This is a low growing evergreen shrub that will only mature to two and a half feet tall and three feet wide. It's great garden specimen.

Other Articles You Might Be Interested In.

Indian Hawthorn --- Rhododendron

Love Of Roses --- More A-Z Plants (Besides Letters Q and R Plants)

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