2nd Year Maturity. Magic Fountains Series delphinium seeds promise some of the most stunning, bold, and vivid blooms available in any garden. Magic Fountains Series seeds grow densely floreted 12-15 inch blooming spikes ideal for any seasonal fresh cut basket, bouquet, or centerpiece. Magic Fountains Series is a smaller, neater variety of delphinium and perfectly complements summertime favorites such as larkspur, lupinus, and penstemon. Delphinium has been popularly cultivated for nearly 500 years and, once established, it's easy to see why.