This grower is fairly sure of this plant identification.
Dierama pumilum (Wandflower). This species is a clump forming perennial. The bell-shaped flowers are produced on arching stems with red-pink blooms in the summer.
They are frost to half hardy, and will prefer a warm, sheltered or sunny site with well drained soil that should be kept moist in the summer when in growth. Dies down partially in winter.
In or near water (semi-aquatic)