Plants for the Garden (Leasgill LA7)

I have big chunks of three garden plants which if planted soon in the right place should flower this summer. The following plants are available:
1. https://www.rhs.org.uk/plants/7221/filipendula-rubra-magnifica/details
This is derived from the common wild flower known as meadow sweet. It grows to 2m+ in height and is indeed magnificent, with its beautiful pink feathery flowers on tall arching branches. Warnings: this is a very strong grower and will invade and bully other plants. Needs to be in permanently damp soil, ideally near a pond where it does look superb in flower.
2. https://www.rhs.org.uk/plants/320645/bistorta-officinalis/details
this is the common wild bistort, a tough no nonsense plant. Grows best in damp, even poorly drained ground, and looks great around water. Long flowering season. Grows to 2 feet (60cm) high and spreads cheerfully by means of sub surface rhizomes. Can be a bit invasive.
3. https://www.rhs.org.uk/plants/astilbe
Astilbes are a great garden hardy perennial, easy to grow and tolerant of all sorts of neglect and maltreatment. They are quite shade tolerant, and probably prefer dappled shade rather than full sun. No herbaceous border should be without them. Easy to propagate by division from late autumn to late spring. Prefer a damp soil. Generally about 2 feet (60 cm) tall with attractive foliage and vivid flower spikes over a long period mid to late summer, even early autumn. Variety of colours from creamy white, through various shades of pink and into the red. I cannot promise particular colour.