Golden Drop agapanthus is an deciduous perennial. It's foliage is different from other agapanthus as it's variegated green and gold leaves. In summer soft blue flowers, on upright stems appear which make a lovely contrast against the foliage. 

At a glance:

Deciduous foliage

Soft blue flowers appear in summer 

Full sun

Well drained fertile soil

Half hardy

Will reach a height of 0.4m and a spread of 0.4m over 2-5 years