Delphiniums need space to grow so they're not often included in container planting ideas. However, it's not impossible to grow them in pots, particularly some of the smaller varieties. If you do ...

This should provide your pots with all the goodness they need for much of the growing season. If you want to feed your delphiniums grown in containers, fertilize using a potassium-rich liquid ...

You can make new plants by taking cuttings from the sturdy shoots that appear at the base of the plant in spring. When roots appear at the bottom of the pot, remove bag or take out of propagator.