Some of the most spectacular dahlias are cactus and semi-cactus types. With their spiky blooms, they can trace their lineage back to a single surviving plant grown from a crate of tubers imported into the Netherlands in 1872.
Cactus and semi-cactus dahlias are some of the most eye-catching dahlias you can grow. Their star-like form means they stand up well to inclement weather, because they're less prone to being weighed down by heavy rain than other dahlia types. They also need less staking than other varieties, which tend to have dense, heavy heads of petals. They also make excellent cut flowers.
Dahlia 'Weston Miss'
Dahlia 'Weston Miss' is a miniature-flowered semi-cactus type, with pale petals that stand out well at dusk.
Dahlia 'Reverend P. Holian'
Dahlia 'Reverend P. Holian' is a giant-flowered semi-cactus dahlia. Grow in rich soil for best results.
Dahlia 'Yellow Galator'
A medium-flowered cactus dahlia, 'Yellow Galator' has sunny yellow flowers.
Dahlia 'Pianella' is a small-flowered semi-cactus dahlia, with white-tipped pinky red petals.