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Splitting asparagus crowns is the process of dividing an established asparagus plant into smaller sections, each with its own roots and buds, so you can replant them and grow new plants.
This is a great way to multiply your asparagus patch without buying new crowns every season.
When you split asparagus crowns, you’re basically giving an overcrowded plant more room to breathe and produce.
If you’ve been wondering how to split asparagus crowns, the good news is it’s not complicated once you know the right timing and technique.
In this post, we’ll walk through when to split asparagus crowns, the tools you need, and the step-by-step process so your plants thrive afterward.
Let’s dig in.
When to Split Asparagus Crowns
Timing is everything when you split asparagus crowns, and getting it wrong can set your plants back a full season.
Here’s when you should plan to divide them.
1. Wait Until the Plants Are Dormant
The best time to split asparagus crowns is during dormancy, when the foliage has died back and the plant is resting.
This usually happens in late fall after the first frost, or in early spring before new spears emerge.
When you split asparagus crowns during dormancy, the plant isn’t actively growing, so it handles the shock of division much better.
2. Late Fall Is Ideal
Late fall is arguably the best window to split asparagus crowns in most climates.
The soil is still workable, the plant has stored energy in its roots, and the crowns are easy to locate without spear growth getting in the way.
Just make sure you finish before the ground freezes solid.
3. Early Spring Works Too
If you missed the fall window, early spring is your next best bet to split asparagus crowns.
Do it as soon as the soil can be worked, but before those first spears poke through the surface.
Once spears appear, the plant is awake and dividing it then can stress it badly.
4. Age Matters
Don’t split asparagus crowns that are younger than three years old.
Young crowns need time to establish a strong root system before you divide them.
The sweet spot to split asparagus crowns is when the plants are four to eight years old and the bed has become crowded.
How to Split Asparagus Crowns Step by Step
Now that you know when to split asparagus crowns, let’s talk about how to actually do it.
Follow these steps and your divided crowns will settle in nicely.
1. Gather Your Tools
Before you split asparagus crowns, grab a sharp spade, a garden fork, a knife or pruning saw, and a bucket of water.
You’ll also want compost or aged manure on hand for the replanting hole.
Sharp tools make clean cuts, and clean cuts heal faster.
2. Dig Up the Crowns Carefully
Start by digging about six inches away from the base of the plant to avoid slicing through roots.
Work your fork underneath and lift the entire crown out of the soil.
When you split asparagus crowns, you want the root mass intact, so take your time here.
3. Rinse and Inspect the Crown
Shake off excess soil and rinse the crown with water so you can see what you’re working with.
You’ll notice the crown has multiple buds, often called eyes, along with a tangled root system.
Each section you create needs at least two or three healthy buds to grow into a new plant.
4. Cut the Crown Into Sections
Using your knife or saw, cut the crown into sections, making sure each piece has roots and buds attached.
Aim for pieces about the size of your fist.
This is the moment where you truly split asparagus crowns, so make deliberate cuts rather than tearing the roots apart.
5. Replant Immediately
Don’t let the divisions dry out.
Dig a trench about eight inches deep, set each section in with the buds facing up, and spread the roots out.
Cover with soil and water deeply, and you’ve successfully split asparagus crowns into new plants.
Aftercare Tips When You Split Asparagus Crowns
The work doesn’t stop once you split asparagus crowns.
How you care for them afterward decides whether they thrive or fizzle out.
1. Water Consistently
Keep the soil evenly moist for the first few weeks after you split asparagus crowns.
Don’t drown them, but don’t let them dry out either.
Consistent moisture helps new roots establish quickly.
2. Skip the Harvest
Resist the urge to harvest spears the first year after you split asparagus crowns.
Let the ferns grow and feed the roots instead.
A little patience now means a stronger plant later.
3. Mulch and Feed
Apply a layer of compost or well-rotted manure around your newly divided crowns.
Mulch helps retain moisture and suppresses weeds that compete for nutrients.
Feed again in early spring to support healthy spear production.
4. Watch for Problems
Keep an eye out for yellowing ferns or weak growth after you split asparagus crowns.
These can signal shock, poor drainage, or pests like asparagus beetles.
Address issues early and your plants will bounce back fine.
So, How Do You Split Asparagus Crowns?
You split asparagus crowns by digging up a dormant, established plant, cutting the root mass into sections with at least two or three buds each, and replanting them right away.
The key is timing it during late fall or early spring dormancy and giving each division room to grow.
When you split asparagus crowns the right way, you turn one healthy plant into several, and your patch keeps producing for years.
Now you know exactly when and how to split asparagus crowns, so grab your spade and get started.