how to divide catmint

3 min read 05-02-2025

Catmint (Nepeta), with its fragrant foliage and attractive blooms, is a beloved addition to many gardens. But like many perennials, catmint benefits from occasional division to maintain vigor and prevent overcrowding. This comprehensive guide will walk you through the process of dividing catmint, ensuring your plants thrive for years to come. Dividing catmint is easier than you think!

Why Divide Catmint?

Over time, catmint plants can become overcrowded. This leads to smaller flowers, weaker growth, and a higher susceptibility to disease. Dividing your catmint plants every 2-3 years rejuvenates them, resulting in bushier plants with more abundant blooms. You'll also have extra catmint plants to share with friends or expand your garden!

When to Divide Catmint

The best time to divide catmint is in early spring or fall. Spring division allows the plants to establish themselves before winter. Fall division gives them time to root before the next growing season. Avoid dividing during the hottest part of summer, as this can stress the plants.

Tools You'll Need

Before you begin, gather these essential tools:

Sharp spade or shovel: For cleanly dividing the root ball.
Garden fork: Helpful for loosening the soil around the plant.
Gloves: Protect your hands from thorns or soil.
Watering can: To keep the divided plants hydrated.
Optional: Pruning shears: For trimming back overgrown stems.

How to Divide Catmint: A Step-by-Step Guide

Step 1: Prepare the Plant

Gently loosen the soil around the catmint plant using a garden fork. This will make it easier to lift the plant without damaging the roots. Water the plant thoroughly a day or two before dividing to make the soil easier to work with.

Step 2: Lift the Plant

Carefully lift the catmint plant from the ground using your spade or shovel. Try to get as much of the root ball as possible. If the roots are very large and difficult to lift, you may need to use a larger shovel or work in sections.

Step 3: Divide the Root Ball

Use your spade or shovel to divide the root ball into several sections. Each section should have several healthy stems and a good amount of roots. Aim for divisions that are at least 6 inches in diameter. You can also use your hands to gently separate smaller clumps.

Step 4: Prepare the New Planting Sites

Prepare new planting holes slightly larger than the root balls. Amend the soil with compost or other organic matter to improve drainage and fertility.

Step 5: Plant the Divisions

Place the divided catmint sections into the prepared holes. Backfill the holes with soil, gently firming the soil around the roots. Water thoroughly to settle the soil and help the plants establish themselves.

Step 6: Water and Maintain

Water the newly planted catmint regularly, especially during dry periods. Mulch around the plants to help retain moisture and suppress weeds.

Troubleshooting Common Issues

Plant doesn't bloom after division: This is normal sometimes. Give it time to recover and establish a strong root system before expecting abundant blooms.
Division fails to thrive: Ensure proper watering and soil drainage. Consider adding fertilizer in the spring.
Plants become leggy: This suggests a need for more sunlight or a lack of nutrients.

Tips for Success

Sharpen your tools: Sharp tools make clean cuts, reducing the risk of damaging the roots.
Choose healthy divisions: Select sections with vigorous growth and plenty of roots.
Don't overwater: Overwatering can lead to root rot.
Consider the climate: Adjust your planting time based on your local climate.

Dividing catmint is a simple yet effective way to keep your plants healthy and vibrant. By following these steps, you can enjoy the beauty and fragrance of catmint in your garden for many years to come. Happy gardening!