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. Amhurst Regina A Semi-Cactus Yellow $ 9.00 Clara Huston AA Incurved Cactus Orange $ 7.75 Cynthia Huston A Semi-Cactus Red $ 8.00 Dixie's Winedot A Informal Decorative Variegated Yellow and Red $ 8.25 Elsie Huston A Informal Decorative Pink $ 8.00 Emory Paul AA Informal Decorative Purple $ 9.00 Formby Kaitlin A Formal Decorative Purple $ 9.00 Harvey Koop A Informal Decorative Variegated Dark Red & Yellow $ 12.00 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 Kidd's Climax A Formal Decorative Light Blend Yellow & Pink $ 7.00 Levonne Splinter AA Semi-Cactus Yellow & Orange $ 10.00 Mingus Nicole A Informal Decorative LB Pink & Yellow $ 9.00 Penhill Dark Monarch AA Informal Decorative Purple & Yellow $ 8.00 Show N' Tell AA Laciniated Dark Red & Yellow $ 9.25 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