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Best cascading plants: 5 joyful plants for pots and retaining walls
This article highlights the benefits and specific examples of cascading plants for enhancing various garden features such as retaining walls, garden fences, and hanging baskets. These plants are especially useful for covering awkward or overlooked spaces, softening hard edges, and adding visual impact to a garden.
The author, drawing on personal experience as a horticulturalist, emphasizes the low-maintenance nature and hardiness of the selected species. The recommendation is to use plug plants or grow from seed to allow roots to establish effectively in confined spaces, noting that even small plugs can quickly grow to cover surfaces as the weather warms.
Five specific cascading plants are detailed:
1. **Corydalis (Corydalis lutea)**: This yellow-flowering perennial is praised for its toughness, minimal watering requirements, and long flowering period. It thrives in various conditions, from shade to sun, and prefers well-draining or even poor soils. Hardy down to USDA Zone 5, it is also drought-tolerant once established and self-seeds readily, filling gaps and softening edges. A 'Porcelain blue' variety is also mentioned as an option for different aesthetics.
2. **Creeping Phlox (Phlox stolonifera)**: Native to the Appalachian Mountains, this plant produces blooms in white, pinks, and purples. It prefers well-draining soil and at least two hours of direct sunlight, hardy from Zone 5 to Zone 8. Creeping phlox is known for spreading between rocky areas and tumbling over walls, offering early spring blooms that last about three weeks, with foliage remaining green for most of the year.
3. **Sedum (Stonecrops)**: These succulents are ideal for trailing over garden walls and are generally cold-hardy, suitable for USDA Zones 3 to 9 depending on the species. The cascade stonecrop (Sedum divergens), for example, is a perennial creeping variety that grows well in sunny spots with well-draining soil down to Zone 4. The 'Atlantis' sedum is highlighted for its variegated appearance, suitable for rockeries or retaining walls.
4. **Spurge (Euphorbia)**: While not an obvious choice, varieties like Euphorbia myrsinites (myrtle spurge) are excellent for cascading. They tolerate poor, rocky soil and spread effectively over walls. These evergreen ground cover plants are tough and require little fuss, growing well in sunny spots from Zone 5 upwards. A caution is issued regarding their poisonous sap, which can irritate skin, necessitating the use of gloves during handling.
5. **Creeping Thyme**: This aromatic herb is highly recommended for growing between paving slabs or cascading over walls. It forms dense mats that release a pleasant scent when brushed and produces tiny pink or purple flowers in summer that attract bees. Creeping thyme thrives in full sun and dry, well-drained soil down to Zone 4, making it suitable for sheltered walls or south-facing container gardens.
The article concludes by offering advice on deep watering for new plants, especially in challenging locations, and suggests periwinkle (Vinca minor) as another evergreen cascading option, though with a warning about its potential invasiveness in some regions.
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