Discover the Best Types of Grevilleas and how to grow them easily to have a wonderful display of flowers year round!
Check out the Best Types of Grevilleas that will surely tempt you into growing this plant in your garden. We have also included a detailed information on How to Grow Grevilleas in a Pot too!
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Grevilleas Plant Information
The Grevillea robusta, commonly known as silk oak, is a tree belonging to the Proteaceae family. Originally from Australia, it has adapted well to North America, where it is known as a skyline tree due to its tall and vertical growth. The Grevillea is a fast-growing evergreen tree that can live up to 50 to 65 years. Despite its rugged appearance, it has a delicate structure, and its top branches are prone to breaking off during heavy winds. However, its wood is highly valued for cabinet making.
They have needle-like or narrow leaves, and their foliage can be ferny and pinnate, often arranged in whorls around the stems. The blooms of some species have a pleasant fragrance and are available in three main forms: spider-like, toothbrush-like, and large brushes. Flower heads are made up of many tiny flowers that open at different times, typically in shades of yellow, orange, or red. Blossoms also feature long filamentous styles.
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While it can grow to over 100 feet (30m) tall, mature trees typically reach heights of around 50 to 80 feet (15-24m) and a width of 25 feet (8m) in gardens. Although some compact grevilleas varieties can be grown in pots as well.
Note: The people native to Kenya’s Kakamega forest use the Grevillea robusta for medicinal purposes, specifically to alleviate symptoms of sore throats, earaches, chest problems, flu, and toothaches.
Best Types of Grevilleas
1. Grevillea juniperina ‘molongolo
This shrub has sulfur-yellow apricot blooms and can reach up to 6 to 15 feet in width. It is one of the Best Types of Grevilleas you can grow.
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2. Grevillea ‘Moonlight’
This beautiful plant has fern-like gray leaves and grows up to 8-12 feet tall. To ensure the best growth, make sure it gets plenty of dappled light.
3. Grevillea thelemanniana baby
This low-growing ground cover grows up to 8-10 feet tall and 4 feet wide. It is one of the Best Types of Grevilleas you can grow.
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4. Grevillea lanigera
This fast-growing cultivar can grow up to 1-6 feet tall and 6 feet wide. Use a well-draining growing medium and ensure it gets 3-4 hours of sunlight daily.
5. Grevillea ‘juniperina ‘Gold Cluster’
‘Gold Cluster’ is a groundcover shrub that can grow up to 4 feet wide. It is one of the Best Types of Grevilleas you can grow.
6. Grevillea robusta
This beautiful tree attracts hummingbirds and can reach up to 30-60 feet tall. For best growth, do not overwater the plant and expose it to plenty of dappled light.
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7. Grevillea Robyn Gordon
The Grevillea Robyn Gordon displays red-maroon flowers and grows up to 4-5 feet tall and wide. It is one of the Best Types of Grevilleas you can grow.
8. Grevillea banksii
This large ornamental shrub can reach up to 6-25 feet tall and 6-12 feet wide. Use a well-draining growing medium and ensure it gets plenty of bright and indirect light.
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9. Grevillea rosmarinifolia
Grevillea rosmarinifolia produces red blooms and reaches up to 8-10 feet tall. It is one of the Best Types of Grevilleas you can grow.
10. Grevillea ‘Poorinda Signet’
This low-spreading shrub can grow up to 6-8 feet tall in the right growing conditions. For the best flowers, expose it to 3-4 hours of direct sunlight every day.
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11. Grevillea ‘Poorinda Constance’
‘Poorinda Constance’ is a dense shrub and you can keep its dimensions compact by growing it in a small pot. It is one of the Best Types of Grevilleas you can grow.
12. Grevillea ‘Poorinda Queen’
This flowering shrub displays clusters of stunning red-maroon flowers that grow the best in full sunlight. Also, use well draining growing medium.
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13. Grevillea ‘Poorinda Royal Mantle’
‘Poorinda Royal Mantle’ is a prostrate spreading ground cover with 6-8 feet of spread. It is one of the Best Types of Grevilleas you can grow.
14. Grevillea ‘Poorinda Blondie’
‘Poorinda Blondie’ is a hardy shrub that displays pink-red flowers. If you want the best blooms, then choose a sunny spot to grow it.
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15. Grevillea ‘Poorinda Golden Lyre’
This small ornamental shrub has orange-yellow blooms and rich green foliage. It is one of the Best Types of Grevilleas you can grow.
16. Grevillea Peaches and Cream
Grevillea Peaches and Cream produces pink and yellow blooms. It is quite shade tolerant, so you can also grow it indoors, but it won’t flower as much.
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17. Grevillea Alpin
One of the dwarf species is Grevillea alpine blooms red and cream flowers during April and May. It is one of the Best Types of Grevilleas you can grow.
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How to Propagate Grevilleas?
- Take 4-5 inches-long cuttings from a healthy plant.
- Fill a pot with a well-draining potting mix and place the cuttings.
- Once done, compact the soil around the cutting and water it generously.
- Make sure it gets plenty of dappled light.
- The cuttings will root in 3-5 weeks.
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Best Container Size for Growing Grevilleas in Pots
You can start the plant in a 8-12 inches pot and then re-pot it into one size bigger container according to the growth and spread.
Requirements for Growing Grevillea in a Pot
Location
Grevillea plants prefer full sun or part sun, meaning they need at least 4-6 hours of direct sunlight each day. They also thrive in hotter climates and can tolerate higher temperatures than other plants.
Soil
Grevillea plants prefer light, well-draining soil with a slightly acidic pH between 6.0 and 6.5. It should contain organic matter such as compost or manure. Ensure that the soil is not too compacted and has good drainage.
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Water
Due to its preference for a drier environment, Grevillea does not require frequent watering once it has been established. Water the plant only when the topsoil feels a little dry to the touch.
Do not water the plant on daily basis.
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Grevillea Plant Care
Fertilizer
Generally, it is best to use a slow-release fertilizer with a balanced ratio of nitrogen, phosphorus, and potassium, like a 10-10-10 or 20-20-20 blend. Use it once in 3-5 weeks after diluting it to 1/2 of its strength.
Make sure to follow the instructions on the fertilizer package for proper application.
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Pruning
Pruning Grevillea plants is an important part of their care and can help promote plant health and encourage blooming.
Grevilleas respond well to regular pruning and should be pruned back no more than one-third each time. Pruning should be done after the plant has finished flowering in late summer or early fall.
Pests and Diseases
Grevilleas may be susceptible to attacks from red spider mites and mealybugs. To prevent this, it’s important to deal with any infestations as soon as they are observed by using a suitable systemic insecticide and miticide.
