For the discerning plant enthusiast seeking to add the remarkable Grevillea to their collection, understanding the plant's specific needs is the first step to finding a reputable source in the United States. These Australian natives are celebrated for their intricate, spider-like flowers and resilient, often silvery-green foliage, but they require specific conditions to thrive.
Before purchasing, it is crucial to recognize that most Grevillea species demand excellent drainage and acidic to neutral soil pH. They are highly susceptible to root rot in heavy, water-retentive clay soils. Furthermore, many are sensitive to phosphorus, a common element in standard fertilizers, which can be toxic to them. These specific cultural requirements mean that not every generic nursery will stock or properly care for them. Your best bet is to seek out specialty nurseries that understand the nuances of Australian flora.
The most reliable method for sourcing healthy Grevilleas is through online nurseries that specialize in Australian plants or drought-tolerant exotics. These growers often cultivate their plants in air-pruning pots that encourage a healthy, non-circling root system, which is vital for the success of these sensitive plants. Reputable establishments will provide detailed information on the plant's expected size, bloom color, and hardiness zone. They also typically ship plants bare-root or with a lightweight medium to ensure they arrive in good condition and to comply with agricultural regulations.
In regions with a Mediterranean climate, particularly in California, you may find Grevilleas at select local native plant nurseries or at plant sales hosted by botanical gardens. These venues are excellent because the plants are often already acclimated to your local conditions. Botanical gardens with Australian sections frequently hold annual sales, offering a variety of well-established, healthy specimens. Purchasing locally also allows you to inspect the plant personally for signs of vigor, such as new growth and a lack of yellowing leaves.
In the warmer climates of the West Coast, Southwest, and Gulf Coast (USDA zones 9-10), some larger regional nursery chains may carry a limited selection of the most popular Grevillea cultivars, such as 'Robyn Gordon', 'Long John', or the groundcover 'Austraflora Fanfare'. While convenient, it is imperative to carefully inspect these plants. Check for root health by gently looking at the base of the pot; avoid any plants that are pot-bound with roots circling densely, as this can lead to future establishment problems.
Regardless of your source, always inquire about the plant's provenance and cultivar name. Knowing the exact cultivar allows you to research its specific mature size and cold tolerance. Ensure the plant has vibrant, pest-free foliage and shows active growth. Be prepared to plant it immediately in a raised bed or mound amended with sand, pumice, or perlite to ensure sharp drainage, replicating its native sclerophyllous scrub habitat.
