Astra Double Blue Balloon Flower

Where to Plant

• Sunlight: Plant your Astra Double Blue Balloon Flower in full sun for at least 6 to 8 hours daily to ensure the sturdiest stems and the most intense violet blue color. It can handle partial shade in hotter climates, though you might see slightly fewer blooms and a more relaxed growth habit.
• Soil: These perennials crave deep, organic soil that drains freely to prevent the fleshy taproots from rotting during winter. If you have heavy clay, mix in several inches of compost to improve drainage, or plant them in raised beds to keep their "feet" dry.

Watering Requirements

During the first growing season, provide about an inch of water per week to help the deep taproot system establish itself. Once mature, Balloon Flowers are quite drought tolerant, but inconsistent moisture during the budding stage can cause the "balloons" to drop before they open. Aim for deep, infrequent soakings rather than light sprinkles to encourage roots to grow deeper into the soil.

Pruning Tips

Astra Double Blue blooms on new wood, so you should leave the dead foliage intact over winter to mark the spot, as they are very slow to emerge in spring. In late fall or early spring, cut the old stems back to the ground to make way for fresh growth. Deadheading spent blooms throughout the summer is like giving the plant a second wind, as it prevents seed production and redirects energy into creating more flowers.

Fertilizer Needs

Apply a balanced, slow release fertilizer once in early spring as new shoots emerge to fuel the season's growth. Avoid high nitrogen fertilizers in mid to late summer because they can stimulate soft, leafy growth that is easily damaged by the first frost. A single feeding in spring is usually all these efficient plants need to thrive in most garden settings.