Acacia myrtifolia, known colloquially as myrtle wattle, red stem wattle or red-stemmed wattle, is a species of Acacia native to coastal areas of southern and eastern Australia.
Myrtle wattle has strong resistance to disease and is generally not susceptible to illnesses. Regarding care, this plant is relatively low maintenance. When grown outdoors it needs minimal watering, and larger plants usually do not require pruning. Smaller plants should be pruned after they have bloomed. Myrtle wattlet is suitable for anyone with outdoor space, such as a garden or deck, and does not require a lot of care experience.
How to keep Acacia Myrtifolia.
Light
The health and vitality of myrtle wattle depend heavily on plentiful exposure to light. In its native habitat it would receive sunlight for most of the day. Both too little and too much light can hinder its growth. Every stage of its lifecycle needs this ample illumination for optimal development.
Water
The Myrtle wattle is well-suited to areas with irregular rainfall and demonstrates impressive drought tolerance. It thrives in a balance of dry and humid conditions and typically needs watering every two weeks. This evergreen plant is versatile and can adapt to different climate zones, accommodating a range of watering schedules.
Temperature
Myrtle wattle is a plant native to climates with temperatures from 68 to 100 °F (20 to 38 ℃). It does best within that temperature range, tending to prefer the warmer end. Seasonal adjustments may involve reducing its exposure to excessively cold conditions.
Fertilizer
The best time to fertilize a myrtle wattle is in early spring as it comes out of dormancy. This encourages general growth and the development of flowers. Fertilizing improves the foliage, stems, and branches, and promotes flowers that are larger, more vibrant, and longer-lasting. It also helps move nutrients from the roots to the blooms and enhances the plant’s overall health and resistance to disease.
Pruning
The Myrtle wattle features narrow, elliptical leaves and bright yellow flowers. To promote denser foliage and abundant blooms, prune the plant in late spring after it has finished flowering. Trim one-third of the growth to improve airflow and sunlight penetration. This not only helps maintain a manageable size but also helps prevent disease.
Pot & Repot
When repotting Myrtle wattle, select a pot 1–2 inches (2.5–5 cm) larger with good drainage. Use a well-draining potting mix. Repot in spring or fall, making sure the root ball is slightly lower than the rim of the flower pot. Water thoroughly after repotting and place in a warm spot with indirect sunlight.
Botanical profile.
- Plant Type
- Shrub
- Life Cycle
- Perennial
- Genus
- Acacia
- Family
- Fabaceae
- Hardiness Zone
- 9-11
- Mature Height
- 3.05 m
- Mature Spread
- 3.05 m
- Leaf Color
- Green, Gray
- Leaf Type
- Evergreen
- Flower Color
- Yellow
- Flower Size
- 0.51 cm to 1.27 cm
- Bloom Time
- Late summer, Early fall, Mid fall
- Planting Time
- Spring, Summer, Autumn
- Harvest Time
- Late fall, Early winter, Mid winter
Other names.
Reader questions.
How should I water my Myrtle wattle plant?
When watering your Myrtle wattle, you have a lot of options. You can use watering cans, hoses, or even cups. Just make sure you apply the water directly to the soil, and try to moisten all areas evenly so the whole root system gets what it needs. Using filtered water is best to avoid any harmful particles, and using water that's at or slightly above room temperature is ideal so you don't shock the plant. But overall, the Myrtle wattle is pretty adaptable and will do well with any kind of water you give it.
Why should I put fertilizer on my Myrtle wattle tree?
Fertilization is crucial for the overall health of a Myrtle wattle. It provides the necessary energy and nutrients for the plant to develop healthy foliage, sturdy stems, and branches. Additionally, fertilization plays a significant role in the production of flowers, which are highly valued by gardeners. By using the right fertilizer, the Myrtle wattle is able to efficiently transfer fuel from its roots to its flowers, resulting in large, vibrant, and long-lasting blooms. Proper fertilization also enhances the plant's overall health, making it more resistant to diseases.
How much sunlight does Myrtle wattle need to grow?
Tropical ornamental plants that thrive in full sun require at least 6 hours of direct sunlight each day. These plants are well-suited to areas with strong and direct sunlight, as they need this light to flourish. In their natural habitats, they tend to grow in open fields or along forest edges, where they can enjoy abundant sunlight all day long.
What temperature is best for growing Myrtle wattle?
To help your tropical plants thrive, it's best to maintain a temperature range of 75℉ to 90℉ (25-32℃). While different species can tolerate temperatures outside this range, sticking within a few degrees of these limits will ensure optimal growth. However, there are extreme temperature limits to be aware of. Anything below 50℉ (10℃) or above 95℉ (35℃) can hinder growth and cause issues with the leaves and stems. Low temperatures are particularly damaging, as even a light frost can lead to the death of your tropical plants. In fact, cellular death can occur rapidly, with some species dying within 12 to 24 hours.
What should I do if I give my Myrtle wattle plant too much or too little water?
Outdoor plants, especially newly planted ones or seedlings, are prone to lack of watering. Remember to water them enough for a few months, especially when the tree is small or recently planted. Once the roots are established, Myrtle wattle can rely on rain for most of its water needs. When your Myrtle wattle is in a pot, overwatering is often more likely. If you accidentally overwater your Myrtle wattle, take immediate action to remedy the situation. Stop watering the plant right away to minimize the impact. Then, remove the Myrtle wattle from its pot and inspect the roots. If no root rot is found, you can return the plant to its pot. If root rot is present, trim away the affected roots and consider applying a fungicide. Finally, repot the Myrtle wattle in well-draining soil. In the case of underwatering, simply water the Myrtle wattle more frequently. This is an easy fix. When underwatered, the plant's leaves may droop, dry out, and fall off. With sufficient watering, the leaves will quickly regain fullness. Please adjust your watering frequency as soon as you notice underwatering.
When should I fertilize my Myrtle wattle plant?
The best time to fertilize a Myrtle wattle is in early spring when it is coming out of its dormant phase and getting ready to bloom. Feeding at this time will give the plant the energy it needs to grow and flower. However, it's not the only time you should feed it. Giving it a smaller feeding in the fall can also be beneficial. Some people also choose to fertilize when planting, but it's not always necessary.
What might happen if Myrtle wattle doesn't receive enough sunlight?
Tropical ornamental plants that need full sun may face issues if they don't receive enough sunlight. They might become leggy and weak, and their leaves could turn yellow or pale. Furthermore, they may stop producing flowers. Ultimately, if these plants continue to lack the required amount of direct sunlight, there is a possibility that they may die.
Does the Myrtle wattle need different temperatures at different stages of growth?
Myrtle wattle, a plant that doesn't need temperature changes to enter different growing phases, still requires consistency to thrive. Fluctuating temperatures can hinder its growth at any stage, so it's important to provide a controlled environment. The optimal temperature range for Myrtle wattle is between 75℉ and 90℉ (25-32℃), with staying above the lower limit being particularly crucial. While temperatures exceeding 90℉ (32℃) aren't ideal, this tropical plant can tolerate them reasonably well. On the other hand, temperatures below 50℉ (10℃), especially 40℉/5℃, will directly harm this heat-loving plant.
How frequent should I give water to my Myrtle wattle?
When it comes to plants growing outdoors, most of them can rely on rainfall for sufficient watering. However, if you live in an area with limited rainfall, it's important to provide your plants with regular water. During the spring and fall, watering every two weeks should be enough, but you may need to water more frequently in the summer when plants require more hydration. In the winter, when plants grow slower and need less water, you can reduce your watering. In fact, during winter, you may not need to water your plants at all. If you have a young or newly planted Myrtle wattle, it's best to water it more frequently to help it establish and grow into a resilient plant that can tolerate drought. For potted Myrtle wattle plants, there are two main approaches to determining watering frequency. One option is to follow a set schedule, watering once a week or every other week. However, this may not be suitable for your specific growing conditions. Alternatively, you can adjust your watering based on the moisture of the soil. It's recommended to wait until the top two to four inches of soil (about ⅓ to ½ depth of the pots) have completely dried out before watering again. This method takes into account the plant's actual needs and allows for more flexible watering.
When is the best time to not fertilize my Myrtle wattle?
During winter, Myrtle wattles go into a dormant phase and do not require fertilization. Fertilizing during this time can lead to negative effects from overfertilization. The best times to feed a Myrtle wattle are early spring and fall. This means that during most of the spring and summer, fertilizer is not needed. If the plant is experiencing hot or dry conditions, it is also advisable to refrain from feeding.
What will happen if Myrtle wattle gets too much sunlight? What will happen if Myrtle wattle gets too much sun?
Tropical ornamental plants that thrive in full sun require ample direct sunlight, but excessive exposure to intense sunlight can harm them. Prolonged periods of direct sunlight can cause sunburned leaves or the development of unsightly brown spots. Additionally, if the soil dries out too rapidly in full sun, these plants may become dehydrated.
Does Myrtle wattle require varying temperatures during different seasons?
Myrtle wattle can thrive in a consistent temperature range, making it suitable for indoor cultivation. By controlling the indoor environment, you can ensure the optimal conditions for this plant, regardless of the outside climate. When it comes to light, tropical species like Myrtle wattle prefer partial side-level sun exposure. This means the light they receive should be dappled or filtered, with bright but indirect light being the ideal choice for indoor growth. It's important to avoid excessive direct sunlight, as it can harm the plant's leaves and hinder its growth.