What Is Swan River Myrtle – Learn About Swan River Myrtle Cultivation
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By: Liz Baessler
Swan river myrtle is a very attractive and fascinating flowering plant native to Western Australia. It’s a relatively small shrub that works well planted as a hedge or border. Keep reading to learn more about swan river myrtle cultivation and swan river myrtle care.
What is Swan River Myrtle?
What is swan river myrtle? Its scientific name is Hypocalymma robustum. Although it is native to the southern tip of Western Australia, it has been grown with success in most Mediterranean type climates. In colder climates, it can be planted in a container and brought indoors for the winter.
A relatively small shrub, it tends to grow to between 3 and 5 feet (0.9-1.5 m.) in height, although certain varieties can reach up to 12 feet (3.7 m.) tall. Its flowers are spectacular, blooming in clusters along the stems in shades of bright to deep pink. The flowers tend to bloom from winter through spring. The leaves are much longer than they are wide and deep green.
Swan River Myrtle Cultivation
While it may be native to Australia, this doesn’t mean you cannot grow it elsewhere, provided you can get your hands on one.
Swan river myrtle care is relatively easy. The plant is extremely drought tolerant and needs very little extra watering. The best soil is sand to loam, with neutral to slightly acid pH. It grows best in full sun, but it will easily tolerate some light shade.
It can handle a light frost, but in climates with cold winters, growing swan river myrtle in a container and bringing it indoors for the colder months is the best course of action.
Some light pruning is recommended to keep your swan river myrtle compact and bushy, but it’s not strictly necessary – it’s a naturally compact shrub. Swan river myrtle cultivation is especially rewarding in small spaces and closely planted lines, like natural borders and hedges.
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Hypocalymma robustum, the Swan River myrtle, is a species of shrub in the myrtle family Myrtaceae. It is endemic to the south west region of Western Australia. 
It usually grows up to between 0.4 and 1 metre in height. Pink flowers are produced between June and November (early winter to late spring) in its native range. 
The species was initially given the name Leptospermum robustum without description, and later formally described by botanist John Lindley in Edward's Botanical Register in 1843. 
Its attractive flowers and compact size make it a desirable garden plant.  However, it does need a climate where the summers are dry.  It requires good drainage and prefers a sunny or partially shaded position and has moderate frost resistance.  Propagation is from semi-mature cuttings or seed. 
- ^ ab"Hypocalymma robustum F.Muell". FloraBase. Western Australian Government Department of Parks and Wildlife.
- "Hypocalymma robustum". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government, Canberra . Retrieved 10 October 2008 .
- ^ abcd
- "Hypocalymma robustum". Association of Societies for Growing Australian Plants (ASGAP). Archived from the original on 21 November 2008 . Retrieved 10 October 2008 .
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Swan River Myrtle
A delightful plant producing rich pink flowers with golden stamens in winter and spring. Native to W.A.
Nativ by Plantrite grow and supply plants in different size pots and containers. Here’s what you can expect to see arriving at your door:
Forestry Tubes – A great value option for establishing a native garden. Plants will arrive in pots that are 50mm across the top x 120mm deep. Actual plant height may be between 5-15cm depending on the species. A lot of local species are grown in containers of this size.
68mm – A small square pot that is 68mm wide by 95mm deep. Actual plant height is similar to those supplied in forestry tubes (5-15cm).
140mm – Plants supplied in this size provide a great way to achieve an established looking garden, quickly. The pot size is 135mm wide x 140mm deep. Actual plant size would be around 10-20cm, depending on the species.
175mm – If you are looking for slightly more impact, these are the ones for you. The pots are 180mm wide x 175mm deep. Actual plant height will vary, but typically will be between 15-30cm.
63 cell tray – One tray, holding 63 individual plants of the same type. Average plant height 5-10cm, depending on the species. Ideal for revegetation projects or mass plantings.
Each plant is in a cell, 40mm wide x 90mm deep. The plants can be easily extracted for planting. A great value solution when you need to plant out larger areas. Ensure plants are well watered after planting until established – as these smaller cells can dry out quickly, especially in warmer weather.
Please note, that plants supplied in this container must be ordered in multiples of 63. Sorry, we can’t mix and match different species within the same tray.
30L – Now you are getting serious! These plants are grown and supplied in 30L pots which have two handles to make lifting easy.
Have a question? Check out our frequently asked questions or contact us and we will be happy to help.
We personally deliver your Australian native plants to your door, to ensure they’re delivered safely and with care. Delivery will occur within 3 business days of order confirmation. An email will be sent to confirm delivery date / time.
There is a $50 minimum order value for all deliveries.
Orders over $300 in value are eligible for free delivery within the metro area.
FREQUENTLY ASKED QUESTIONS
Why is my crape myrtle not blooming? Newly-planted crapes may not bloom fully until their second season, so be patient if your crape is still establishing itself. Too much shade may also contribute to fewer blooms. Over-pruning can result in decreased flowering, as your tree’s energy will be spent on producing new branches instead of blooms. Too much water or fertilizer can cause foliage growth at the expense of bloom production.
Are crape myrtle roots invasive? A crape myrtle’s roots may spread out a considerable distance however, they are relatively weak and not aggressive. They do not produce heavy side roots that would cause damage to walkways, driveways, or foundations. Shallow crape myrtle roots may prove to be competition for water with surrounding grass.
Are crape myrtles poisonous? Crape myrtles are listed as a safe plant according to the University of California, Davis. The ASPCA also lists them as being non-toxic to dogs, cats, and horses. For more safe plant choices, see 20 Common Plants Safe for Cats & Dogs.
Are crape myrtles deer resistant? Although no plant can be determined completely deer proof, crape myrtles are rarely eaten by deer.