A Hybrid Variety. 2-3' x 3' wide, (cutting propagated). This is a distinctive cultivar, appropriately named 'Silver Frost' because of its incredible powder-white foliage. 'Silver Frost', a slow grower with stout woody branches, takes 2 to 3 seasons to begin blooming heavily. However, it's worth the wait as the large, showy true-blue flowers are spectacular. Extremely heat tolerant! *Not recommended for fall planting in Zone 6.* Zones 6-10. 5" deep Premium pot.