Mar 16, 2020 · 'Mini Stars' delphinium is a dwarf type, with plants growing 18 to 30 inches tall. The shorter stature means plants typically don't need staking, except possibly in the windiest loions. This is the perfect delphinium for tucking into pots or the front of a planting border. Flowers offer shades of purple, blue, mauve, pink, lavender and ...