How to Grow Waratahs
Striking, Iconic, and Worth the Patience
Waratahs (genus Telopea) are some of Australia’s most spectacular native flowering shrubs - known for their vivid red blooms and architectural form. Growing them from seed takes time and care, but the results are well worth it.
Nindethana offers a wide range of everlasting species and mixes, carefully selected for colour, reliability, and performance.
When to sow waratahs?
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Sow seeds in late summer to early autumn (February to April) or in early spring in cooler climates
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We recommend sowing in trays or pots to maintain control over soil, moisture, and temperature.
Site and climate considerations
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Waratahs grow best in full sun to dappled shade.
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Mature plants tolerate light frost, but young plants should be protected from extreme cold and drying winds.
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In warmer areas, some afternoon shade can help prevent heat stress during establishment.
Seed Treatment
Waratah seed does not require pre-treatment. For best results, use fresh seed. Germination usually takes between 3 and 6 weeks under optimal conditions.
How to sow
- Use a well-drained, low-phosphorus propagation mix.
- Sow seeds on the surface and lightly cover with a thin layer of mix or vermiculite (approximately 1 to 2 mm deep).
- Maintain steady moisture without waterlogging.
- Ideal germination temperature is between 18 and 22°C.
Growing tips for waratahs
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Once seedlings have developed four or more true leaves, transplant into individual pots filled with native plant potting mix that is low in phosphorus.
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Waratahs prefer acidic, free-draining soils and benefit from slightly elevated planting positions to improve drainage.
- When selecting a plant for planting into the garden ensure that it is at least 15 cms tall. Plants of this size should have a noticeable swelling at the base of the stem where it enters the soil. This 'swollen' tissue is called a lignotuber and it contains numerous dormant buds.
Quick tips for success with waratahs
- Avoid excessive watering; Waratahs are prone to root rot if soil stays wet.
- Use mulch to suppress weeds and retain soil moisture, but keep it clear of the plant's base.
- Protect young plants from slugs, snails, and grazing animals.
- Fertilise sparingly and only with products safe for phosphorus-sensitive native plants.
Detailed cultivation notes for waratahs
Waratahs generally appreciate a friable soil of good texture. The incorporation of a rich leaf compost or similar material is beneficial. If other soil is add to the site, always incorporate it into the existing soil. Do not excavate a large hole and then fill it with a good soil mix, as water will accumulate in the hole resulting in wet feet and probable plant death.
Good drainage is essential, and if possible should extend to a depth of 45 cm. Drainage can be improved by building a raised bed or mound. If this is done, be sure to break the existing soil where the mound is to be located so that the new soil can be incorporated with the existing soil.
Watering can be carried out during hot or dry spells. Never let the soil dry out completely. Over-watering in heavy soils will cause waterlogging.
Waratahs appear to be adaptable to various situations but a semi-shaded position or at least shade from afternoon sun is desirable.
Mulch the surrounding soil to a depth of 5-6 cms. This will help to keep the soil moist and keep the surface roots cool. Mulch also helps to prevent weed growth in the vicinity of the plant. If weeds are allowed to grow they provide direct competition to the plant for nutrients and water. Removal of weeds may also disturb the surface roots and result in setback of the plant.
Plant the waratah in such a place that it is able to receive plenty of air circulation and room in which to grow.
Flowers can be cut for indoor decoration or can be removed from the plant after flowering has finished by cutting the canes back to at least half of their length. Do not let seed set unless it is wanted as the formation of seeds sap a lot of strength form the plant.
Waratahs respond well to applications of a slow-release nitrogenous fertilizer such as blood-and-bone or a slow release general purpose fertilizer such as Osmocote applied at 100 gm/sq.m. once each year in Spring.
Species Available
Nindethana supplies seed for several Telopea species and subspecies, including:
- Telopea speciosissima (New South Wales Waratah)
- Telopea truncata (Tasmanian Waratah)
- Telopea mongaensis and hybrids
These species vary in their environmental preferences and flower form but share similar propagation requirements.
Growing Waratahs from seed requires attention and time, but for those who persist, the reward is a spectacular and long-lived native plant.
Want help selecting the right waratah for your region? Contact us - we’re happy to help.