You've got your plants. They're sitting in your driveway looking hopeful. Now what?
Planting perennials is not complicated, but there are a few things that make the difference between a plant that thrives and one that sulks for two years and then gives up. I've planted thousands of perennials, and I promise — if you follow these steps, you'll be fine.
Before You Dig
Lay everything out first. Put each pot where it's supposed to go according to your blueprint. Stand back and look. This is your chance to make sure the spacing feels right and nothing got mixed up. It's a lot easier to move pots around than to dig a plant back up.
Water your plants. If the pots feel light and the soil is pulling away from the edges, give them a good soak an hour before you start. Planting a dry root ball into the ground is a rough start for any plant.
Pick a cloudy day (or plant in the evening). Full sun on a hot day is stressful for a newly planted perennial. If you can't avoid the heat, just make sure you water immediately after.
The Actual Planting Part
Here's the step-by-step. It's the same for almost every perennial:
1. Dig the hole. Make it about twice as wide as the pot and just as deep. Not deeper — this is important. If you plant too deep, the crown can rot. Too shallow and the roots dry out.
2. Loosen the roots. Slide the plant out of the pot, turn it upside down and gently squeeze the sides. See those roots circling the bottom? Tease them apart with your fingers. I know it feels like you're hurting the plant. You're not. You're telling the roots "spread out" instead of "keep going in circles."
3. Place the plant. Set it in the hole so the top of the root ball is level with the surrounding soil. Not above. Not below. Level.
4. Backfill and firm. Push the soil back around the plant and press gently with your hands. You want good contact between the roots and the soil, but don't stomp on it — compacted soil is hard for roots to grow through.
5. Water deeply. Give it a slow, thorough soak right away. Not a quick sprinkle — I mean let the hose run at the base for 30 seconds to a minute. This settles the soil around the roots and eliminates air pockets.
Mulch (Yes, You Need It)
After everything is planted and watered, spread 2–3 inches of mulch over the entire bed. Shredded hardwood bark is my go-to. It holds moisture, keeps weeds down, and looks clean.
Two rules with mulch:
Keep it away from the stems. Don't pile mulch up against the base of the plant — leave a little breathing room, about an inch or two. Mulch sitting against stems invites rot and critters.
Don't go crazy with the depth. 2–3 inches is plenty. More than that and you're smothering the soil underneath.
The First Two Weeks
This is the critical window. Your plants are getting used to their new home, and they need consistent moisture to establish roots.
Water every other day for the first two weeks unless it rains. After that, you can back off to twice a week. By mid-summer, most established perennials can handle whatever nature throws at them (with some exceptions — I'll cover watering in depth in another post).
If a plant looks droopy the day after planting, don't panic. That's transplant shock, and it's normal. Keep watering and give it a week. Nine times out of ten, it perks right back up.
Common Mistakes I See
Planting too deep. This is the big one. If the crown of the plant (where the stems meet the roots) is buried under soil, it will struggle or rot. Keep it at soil level.
Forgetting to water after planting. You'd be surprised how many people skip this step. The initial watering is non-negotiable.
Spacing too close because "it looks empty." I know it looks sparse right now. That's normal. Perennials need room to fill in, and they will — usually by year two. Trust your plan's spacing.
That's it. You've got a plan that tells you where everything goes. Now you know how to put it in the ground. The hardest part is already behind you.