Astilbe seeds are usually sown indoors in early spring and transplanted outside when the weather is warmer. Use a loose, soft soil mix, and plant the seeds on the surface, pressing them into the soil.
Make sure that the soil drains well and is able to keep the flower seeds moist, but not wet, at all times. For the best results, add in a little fertilizer that has a high concentration of nitrogen.
Keep the plants inside until the seedlings reach about 2 inches in height. Transplant after last frost.
Grande Astilbe (Astilbe arendsii) is a showy shade-loving perennial admired for its tall, feathery flower plumes in a beautiful mixture of rose-red, pink, blush, and creamy white shades. Rising above glossy, finely divided green foliage, the upright plumes bring soft texture, bright color, and graceful movement to shaded gardens during early to midsummer. This elegant perennial is especially valuable in moist woodland borders, shade gardens, and partially shaded perennial beds where many sun-loving flowers struggle.
Garden Uses
Grande Astilbe is perfect for shade gardens, woodland borders, moist perennial beds, rain gardens, stream banks, foundation plantings, and cutting gardens. Its colorful plumes provide excellent vertical interest and combine beautifully with hostas, ferns, heuchera, ligularia, brunnera, Japanese forest grass, hellebores, and other moisture-loving shade perennials. Planted in groups, it creates a soft, romantic display that brightens darker corners of the garden.
Growing Information
Grow Grande Astilbe in partial shade to full shade and rich, moist, well-drained soil. Morning sun with afternoon shade is ideal, especially in warmer climates. Plants typically reach 24 to 36 inches tall with a spread of 18 to 24 inches. Consistent moisture is important, as Astilbe does not like to dry out during active growth. Mulching helps conserve soil moisture and keeps roots cool. Remove spent plumes after flowering if desired, or leave them for attractive dried texture. Divide mature clumps every few years to maintain vigor.