06/15/2026
Sometimes I get the questions… “Why so many plants, it seems like too much for this space? Won’t they just fill in on their own?”
There are a few reasons why I like to install on 1’ centers.
1. Faster establishment. “Nature abhors a vacuum”. If you don’t fill in the gaps, the weeds will do it for you. You want the garden to establish quickly to out-compete the weeds and so you won’t have to replenish mulch every year.
2. Layers - both physical and temporal. Matrix-based planting techniques require a lot of plants to accommodate succession of blooms, plant behavior and niches. This gets a little complicated - ya gotta know how/when a plant likes to shine and how/when it goes dormant.
3. Aesthetics. A designed plan with a vision that is installed at the same time has a more intentional appearance and a cohesive structure
4. Loss is less noticeable when you plant dense and diverse. In nature there are no guarantees. Not every plant is going to survive, it’s just the nature of nature . There are so many factors that we know and don’t know working for and against young, vulnerable plants
5. Lower costs. This seems counterintuitive since we’re buying so many plants but if you purchase full plug trays instead of individual pots your price per plant drops in half or even more.
6. Other factors that I don’t have space for include propagation, various root structures of different species and plant lifespan
The garden in these pics was planted last October and it’s filling in nicely with the 1’ centers approach. Even under those 7-gallon White Oak and Ironwood plantings I have Phlox pilosa on 1’ centers inside those deer-exclusion cages.
Not every species should be that close but since I’m typically working with shorter-growing species meant for oak barrens, oak savanna, oak woodland habitats this spacing is appropriate. If it were a garden modeled on a tallgrass prairie with rich soils those plants are more dense and tall so you wouldn’t want to crowd them in that tight in a small garden bed. Joe-Pye, Rosinweed, Wild Bergamot, Big Bluestem, Cupplant, Ironweed, etc would be more like 18” or even 2’ centers.