$2,000 to plant 7 hydrangeas and 15 bleeding hearts in retaining wall? Is that too high?

We just got a quote from a landscaper to plant 7 limelight hydrangeas and 15 bleeding hearts into our retaining wall. That price seems really high, or am I crazy? That doesn't even include the cost of the soil, which is about $1500.

Edit: thank you everyone! More details: 7 cubic yards of topsoil/compost mix. Hydrangeas are 7 gallons. The bleeding hearts are flowers (not a bush or anything, so there's no gallon size quoted). We are unfortunately unable to do this work ourselves.

One MAJOR thing we are considering is the fact that this landscaper is the one who actually installed the retaining wall, so we have a pre-existing relationship with him. He did not overcharge for the wall based on other quotes we got. He did a good job. So obviously I want to go with him, but I just choked when I saw those costs and looked up the raw cost of the flowers and hydrangeas. Obviously labor is a big deal as everyone has pointed out in the comments. Our backyard is difficult to access: small driveway, very hilly, fenced in, etc.

Edit 2: https://imgur.com/gallery/etEXFIc picture of the retaining wall where the flowers will be planted