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Arum lilies can be divided successfully to encourage healthy growth and multiply your plants.
Dividing arum lilies involves separating their rhizomes or tubers to create new plants.
This process is best done during their dormant season to avoid stressing the plants.
In this post, we will explore how to divide arum lilies effectively, when to divide them, and tips to care for the divisions.
Let’s dive into how to divide arum lilies so your garden stays vibrant and flourishing.
Why Divide Arum Lilies and How to Do It
Dividing arum lilies is essential for maintaining plant health and encouraging vigorous blooms.
Here’s why you should divide your arum lilies and how to do it properly.
1. Prevent Crowding and Boost Growth
Arum lilies grow from underground rhizomes that can become crowded over time.
When the plants get too crowded, flowering can decrease, and growth may slow.
Dividing arum lilies allows you to separate thick clumps and give each plant more space to thrive.
2. Multiply Your Plants
If you want more arum lilies in your garden, dividing the rhizomes is the easiest and most reliable way.
From a single healthy plant, you can create several new plants by dividing the rhizomes.
3. When to Divide Arum Lilies
The best time to divide arum lilies is in late winter to early spring before new growth starts.
Dividing during dormancy reduces stress and helps the plants recover quickly once replanted.
You can also divide in the fall after the foliage has died back.
4. Step-by-Step Guide on How to Divide Arum Lilies
First, gently dig up the clump of arum lilies you want to divide without damaging the roots.
Next, shake or wash away excess soil so you can see the rhizomes clearly.
Using a clean, sharp knife or garden shears, cut the rhizomes into sections, making sure each division has at least one growing point or bud and some roots attached.
Discard any old, damaged, or rotting parts to keep your divisions healthy.
Finally, replant the divisions at the same depth they were growing before, spacing them about 12 to 18 inches apart to allow for growth.
When and Why to Divide Arum Lilies
Knowing the right timing and reasons for dividing arum lilies ensures your gardening efforts are successful.
1. Understanding Arum Lily Growth Cycle
Arum lilies usually go dormant in colder months, losing their leaves and resting underground.
Dividing during this dormant period is best since the plant is not actively growing and will experience less shock.
2. Signs It’s Time to Divide Arum Lilies
If your arum lilies produce fewer flowers or the foliage looks crowded and unhealthy, it’s a good sign to divide.
Clumps that have grown too large can choke themselves, so dividing rejuvenates the plant.
3. Seasonal Timing for Division
Late winter or early spring is ideal, just before the new shoots start appearing.
This timing gives the divisions a head start to establish roots and grow before the heat of summer.
Alternatively, dividing in early fall when the foliage dies back also works well.
Caring for Arum Lily Divisions After Dividing
Proper care after dividing arum lilies ensures your new plants thrive and grow beautiful flowers.
1. Watering Your New Divisions
Keep the soil moist but not waterlogged after planting the divisions.
Consistent watering helps the new roots establish and keeps the division healthy.
2. Location and Soil Requirements
Plant arum lilies in well-draining soil enriched with organic matter.
They grow best in partial shade but tolerate full sun in cooler climates.
Avoid waterlogged areas as arum lilies prefer moist but not soggy soil conditions.
3. Fertilizing After Division
Applying a balanced, slow-release fertilizer after division supports healthy root and foliage growth.
Feed your divisions every 4-6 weeks during the growing season for best results.
4. Mulching to Protect Divisions
A layer of mulch helps retain moisture and keeps the soil temperature stable around your new plantings.
Mulching also suppresses weeds that compete for nutrients.
Common Mistakes to Avoid When Dividing Arum Lilies
Knowing what not to do is as important as knowing the right steps when it comes to dividing arum lilies.
1. Dividing at the Wrong Time
Dividing arum lilies during their active growing season can cause stress and stunt growth.
Stick to dormant periods like late winter or early spring.
2. Cutting Rhizomes Improperly
Avoid dividing rhizomes into pieces without buds or roots since these won’t grow into new plants.
Always make sure each division has a healthy growing point.
3. Overwatering After Division
While watering is essential, too much water can cause rot.
Aim to keep soil evenly moist, not soaked.
4. Ignoring Soil Drainage
Poor drainage can lead to rhizome rot and failure of the divisions.
Plant in soil that drains well to prevent water accumulation.
So, How to Divide Arum Lilies?
Dividing arum lilies is a straightforward process that keeps your plants healthy and multiplies their beauty.
You divide arum lilies by digging up their rhizomes during dormancy, carefully cutting sections with roots and buds, and replanting them at proper spacing.
Doing this in late winter or early spring ensures best recovery and bloom performance.
After dividing arum lilies, provide well-draining soil, consistent moisture, and some fertilizer to encourage strong growth.
Avoid common pitfalls like dividing at the wrong time, overwatering, or having poor soil drainage for the healthiest results.
Following these steps on how to divide arum lilies will help you enjoy a flourishing garden with plenty of gorgeous blooms season after season.
Happy gardening!