They will open further and develop a pale, beige color. Treatment with glycerin will keep the leaves pliable and turn them a mahogany shade. If you can't locate them, ask your favorite garden center to order them for you, as there are several local commercial growers in our area. Proteas are considered difficult to grow, so they're definitely not for beginners. But the most critical factor in growing proteas successfully is adequate drainage, as they will not tolerate heavy clay soils.
Sunny slopes are ideal or slightly elevated mounds, so excess water can run off.
Protection from drying winds is also essential, as are good air circulation and full sun. Once plants are established, water only every 2 to 4 weeks. Fertilizer lightly with nitrogen, but avoid fertilizers with phosphorus. Smaller species can also be grown as patio plants in 5-gallon or larger containers. Place them in full sunlight.