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Most catmint varieties are hardy in USDA zones 3-8 but check the tag to be sure. They like full sun but will still do well in partial shade. Southern gardeners may find catmints enjoy afternoon shade to give them a break from the harsh sun. 

Catmints are not picky about soil and thrive in drier locations and less fertile soil. Neutral to slightly alkaline pH is fine. 

When to Plant Catmint

Catmint is usually planted in spring when it is available from garden centers. However, if you find one on the discount rack later in the summer, grab it. You can still plant catmint all summer if needed. 

Try to get catmints in the ground at least 4-6 weeks before your killing frosts to allow the root systems time to develop before the plant goes dormant for the winter. 

How to Plant Catmint

Select a location with good drainage. Catmint enjoys drier sites and will suffer in soggy soil. If planting in a pot, use a high-quality potting mix and consider adding some perlite.  

• Water your catmint while it is still in the pot. Let it absorb while you are prepping the hole. Your plant will have a nice drink before the stress of being transplanted, and it will slide out of the pot easier.
   
• Dig a hole 1.5-2 times as wide as the rootball and the same depth. The hole should look like a shallow bowl, not a fencepost hole. 
   
• Test fit the plant in the hole, ensuring the crown will be level with the top of the surrounding soil once planted. Adjust the depth by digging or filling in the hole as needed.
   
• Remove the catmint from its pot and tease apart any pot-bound roots. Use a handheld garden tool to cut any girdling roots.
   
• Set your catmint in the hole and backfill with the removed soil. Be sure to firm the soil to eliminate air pockets around the roots. 
   
• Create a shallow ring around the plant with the leftover soil to slow water from running away. Water the new plant and surrounding soil well.
   
• Mulch around the base, but keep the mulch from touching the stems. Mulch touching the plant stems can encourage rot and disease.