Potted mint mortality is generally due to avoidable practices. My first mint plant was planted in a pot for decoration that didn't have any holes in the bottom. That mint plant perished after its first few weeks with increasingly yellowing leaves due to root rot. I learned the hard way regarding pot selection. Let's cut to the chase. Let's dig into the top killers and science-based remedies.
Drainage Disasters
- No drainage holes - Roots suffocate in 7-10 days
- Fix: Drill 3+ 1/4" holes in pot base
- Emergency: Repot within 48 hours of soggy soil
Lighting Missteps
- Less than 4 hours light - Stems stretch weakly
- Fix: Use full-spectrum LED grow lights 12" above plants
- Monitor: Leaf spacing under 1" indicates adequate light
Root-bound plants console themselves in their death. When roots tangle so tightly, they can no longer effectively absorb nutrients. I revived a dying mint plant by cutting its root ball into quarters and repotting each quarter into its container. Nine days later, the original mint plant had new growth - which was no small feat.
Overwatered Plants
- Remove plant immediately
- Trim black/mushy roots
- Repot in 50% perlite mix
Light-Deprived Mint
- Prune leggy stems by 50%
- Install 6500K LED lighting
- Rotate pot 180° daily
The process of preventing winter kills begins when the thermometer drops below 50°F, so watering must be reduced. My mind that I keep in the kitchen window grows well all year with a weekly application of 1/4-strength fertilizer. If you have containers outside, they will need insulation in the pots to protect them from frost, similar to what I do in zone 6b using bubble wrap.
Read the full article: How to Grow Mint: Expert Tips for Thriving Plants
