The ‘Cousin It’ plant (Casuarina glauca ‘Cousin It’) is a distinctive and popular choice for gardens. Celebrated for its dense, cascading foliage, it forms a lush, low-growing groundcover or an attractive accent plant. Its trailing tendrils create a flowing appearance, ideal for spilling over walls or softening hardscape. This adaptable, resilient, low-maintenance plant appeals to many gardeners.
Essential Care Requirements
The ‘Cousin It’ plant thrives in full sun, which encourages denser, more vibrant growth, though it tolerates partial shade. Once established, it is remarkably drought-tolerant. During its initial establishment, consistent moisture is important; allow the topsoil to dry slightly between waterings to prevent root rot.
It adapts to a wide range of well-draining soil conditions, including sandy, loamy, or clay. The plant is hardy in USDA zones 8 to 11, tolerating heat and light frost once established. While heavy frost may brown top foliage, new growth typically emerges in spring.
Planting and Establishment
Choose a site with full sun to partial shade and good drainage. Consider its mature spread, which can be significant, allowing ample space for its cascading habit.
Before planting, prepare the soil by digging a wide hole. Amending heavy soils with organic matter can improve drainage. Position the plant so the top of the root ball is level with the soil surface, then backfill. Water thoroughly after planting to settle the soil. Consistent watering during the first growing season encourages robust root development, though the plant is drought-tolerant once established.
Ongoing Maintenance
The ‘Cousin It’ plant requires minimal pruning due to its naturally prostrate, cascading growth. Light trimming helps maintain its shape, control spread, and encourage denser foliage. Selectively cut back longer trails or remove any dead or yellowing leaves to maintain vitality and appearance.
Fertilizing is not a frequent requirement, as it is not a heavy feeder. If growth is slow or soil is poor, apply a balanced, slow-release fertilizer in spring. A layer of organic mulch around the base helps retain soil moisture, suppress weeds, and regulate soil temperature.
Troubleshooting Common Issues
Browning foliage can indicate environmental stress. Underwatering, especially during establishment or dry spells, leads to dry leaves. Overwatering and poor drainage cause yellowing leaves and root rot. Extreme heat or light frost can also brown foliage, though the plant typically recovers.
Lack of vigor or stunted growth may result from insufficient light; full sun promotes the best growth. Nutrient deficiencies are rare but can be addressed with light fertilizer. Proper soil drainage is important, as wet conditions inhibit healthy development. ‘Cousin It’ is generally resistant to most pests and diseases. Occasional aphids or scale insects can be managed with horticultural oils.