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. Aitara Majesty AA Semi-Cactus Yellow $ 8.75 Alfred C AA Semi-Cactus Orange $ 6.00 Almand Joy A Formal Decorative White & Lavender $ 6.75 Andriana A Laciniated White $ 6.75 Ayers White Knight AA Semi-Cactus White $ 9.00 Barbara B AA Informal Decorative Dark Pink $ 7.75 Belle of Barmera AA Informal Decorative Dark Pink $ 9.00 Ben Huston AA Informal Decorative Bronze $ 7.25 Big Boy AA Informal Decorative Flame Blend $ 9.00 Bodacious AA Informal Decorative Red $ 7.00 Camano Messenger A Incurved Cactus Light Blend - Pink & Yellow $ 7.25 Camano Sitka A Incurved Cactus Dark Blend - Yellow & Bronze $ 7.00 Camano Titan AA Informal Decorative Pink $ 8.00 Cheerleader AA Semi-Cactus Lavender $ 7.25 Clara Huston AA Incurved Cactus Orange $ 7.00 Clyde's Choice AA Formal Decorative Orange $ 7.50 Creve Coeur AA Semi-Cactus Red $ 8.00 Cyril Higgo A Laciniated Red $ 8.75 Devon Liam A Semi-Cactus Yellow $ 9.00 Drummer Boy A Formal Decorative Dark Red $ 8.00 Elsie Huston A Informal Decorative Pink $ 8.00 Ferncliff Illusion A Informal Decorative Light Blend White & Lavender $ 7.25 Formby Kaitlin A Formal Decorative Purple $ 9.00 GW's Mister Dean A Laciniated Bronze $ 7.00 Hollyhill Electra A Incurved Cactus Orange $ 8.00 Inland Dynasty AA Semi-Cactus Yellow $ 7.50 Islander A Informal Decorative Dark Pink $ 8.00 Ivory Palaces AA Informal Decorative Yellow $ 8.00 Kenora Wildfire A Semi-Cactus Red $ 7.75 Kidd's Climax A Formal Decorative Light Blend Yellow & Pink $ 7.00 Mingus Julie M A Cactus Light Blend Pink & White $ 7.00 Mingus Whitney AA Informal Decorative White $ 7.00 Penhill Dark Monarch AA Informal Decorative Purple & Yellow $ 8.00 Penhill Watermelon AA Informal Decorative Blend Pink & Yellow $ 8.00 Pink Jupiter A Semi-Cactus Light Blend Pink & Dark Pink $ 9.00 Rhiannon Tammy AA Informal Decorative Yellow $ 9.50 Show N' Tell AA Laciniated Dark Red & Yellow $ 9.25 Sir Alf Ramsey AA Informal Decorative Lavender & White $ 9.00 Spartacus A Informal Decorative Dark Red $ 8.00 Timona Pastel A Semi-Cactus Light Blend Pink & Yellow New from UK $ 8.75 Vassio Meggos A Informal Decorative Lavender $ 12.00 Vera's Elma A Informal Decorative Lavender $ 6.75 Verda A Semi-Cactus White $ 6.50 Zorro AA Semi-Cactus Dark Red $ 8.00