The "AA" sized dahlias are the true giants of the dahlia world. Blooms can easily reach 11-12 inches. "A" size dahlias average 9-10 inches. These giants require staking to support the massive blooms. Plant height varies from 3' to 6' within this category. Bloom size and plant height are not necessarily linked. Click images to enlarge. Clyde's Choice AA Formal Decorative Orange $ 9.50 Dixie's Winedot A Informal Decorative Variegated Yellow and Red $ 8.25 Eden Talos A Semi-Cactus Bronze 2012 ADS Medal Winner $ 18.00 Elma Elizabeth A Formal Decorative Lavender $ 10.00 Elsie Huston A Informal Decorative Pink $ 8.00 Emory Paul AA Informal Decorative Purple $ 9.00 Formby Kaitlin A Formal Decorative Purple $ 9.00 Hollyhill Electra A Incurved Cactus Orange $ 8.00 Hy Debut A Cactus White $ 10.00 Inland Dynasty AA Semi-Cactus Yellow $ 9.50 Jackie Evangelista A Semi-Cactus Pink & Yellow New 2012 $ 20.00 Levonne Splinter AA Semi-Cactus Yellow & Orange $ 10.00 Penhill Dark Monarch AA Informal Decorative Purple & Yellow $ 8.00 Show N' Tell AA Laciniated Dark Red & Yellow $ 9.25 Trooper Dan A Semi-Cactus Yellow $ 9.00 Verda A Semi-Cactus White $ 6.50 Wanda's Aurora AA Informal Decorative Dark Pink & Yellow $ 10.00 Zorro AA Semi-Cactus Dark Red $ 8.00