Botanical Name: Lobularia maritima ‘Stream™ Compact Purple’ Common Name: Sweet Alyssum Hardiness Zone: Grown as an Annual in Most Climates (Perennial in USDA Zones 9–11) Size: 4–6" Tall × 8–12" Spread Growth Habit: Compact, Dense, Mounding Habit Sunlight: Full Sun to Partial Shade (Best Performance in Cooler Weather) Soil: Well-Drained Soil; Adapts to Average Garden Conditions Water Needs: Low to Moderate; Drought Tolerant Once Established Bloom Season: Early Spring through Summer (Excellent Heat Tolerance for Alyssum) Fertilizer: Light Feeding as Needed Features: Rich Purple Blooms, Compact Form, Improved Heat Tolerance, Lightly Fragrant Uses: Containers, Edging, Borders, Window Boxes, Cool-Season Color

Patent: ✔ Patented Propagation: ❌ Propagation Prohibited Without License

More About Lobularia ‘Stream™ Compact Purple’

Lobularia ‘Stream™ Compact Purple’ delivers deep purple flower clusters on a tight, controlled plant, offering strong color without excessive spread. The blooms form a dense carpet of color that holds up well as temperatures warm, outperforming many traditional alyssum varieties.

As part of the Stream™ series, this selection was bred for uniform growth, compact habit, and improved heat tolerance, making it especially well suited for small containers and clean edging applications.

Why We Like It (Our Trials)

In our trials, ‘Stream™ Compact Purple’ has been exceptionally reliable from early spring into early summer. It maintains its compact form without stretching, flowers continuously, and rebounds quickly after brief heat stress. We especially appreciate its scale. It provides the fragrance and color alyssum is known for in a size that’s easy to manage, making it ideal for tight planting schemes and detailed container designs.

Stream™ Compact Purple vs. Other Sweet Alyssum

Within the Stream™ Series, ‘Compact Purple’ delivers the strongest color while maintaining a tight, disciplined habit. Compared to Compact White, it provides more contrast, and compared to Compact Rose, it offers richer saturation. Compact Purple also holds its color more consistently in warmer conditions than Compact Rose or White. However, all varieties stay low and uniform with minimal maintenance.

Compared to Yolo Purple, it is smaller and more rigid in form. This makes it especially well suited for edging, window boxes, and designs where precise spacing and uniformity matter. Against Easy Breezy™ Purple, it lacks trailing but excels in control. Among purple Sweet Alyssum, Compact Purple is ideal for clean, modern plantings. Gardeners appreciate Stream™ Compact Purple for reliable color without sprawl.