Backyard Priority Project #1: South Fence Line - Oak Leaf Hydrangeas + Astilbes + Allium

As part of my 2020 planting/buying plan, I've begun to focus on a couple of areas for prioritization. We have SOOOO much to do in regards to buying new plants per our plan that I thought it would make sense to break things up into chunks. The first one up on my priority list is this section of the landscape plan that is visible from our patio. It calls for seven new Alice Oak Leaf Hydrangea bordered on one side by a series of Summer Beauty Allium and underplanted with Fanal Astilbe out front. You'll see in the image above that I've called out 3 'columnar trees' in teal. That's based on this tree-planning post . We have three existing hydrangeas in this area - where the Oak Leaf ones are supposed to go - including this Tuff Stuff and this Everlasting Revolution and this teardown Limelight . The first two were planted very small and have NOT bloomed, but the Limelight one that I transplanted bloomed last year , so I want to think about what to d