When should I add drainage holes to my planter?

Think of it this way: if you can't control the amount of water your plant receives, drainage holes can help.

Planter location will help you decide if holes are necessary:

• If located indoors, you don't need to add drainage holes. If the planter already has holes, a drip pan can catch any excess water.
• If the planter will be located in a covered outdoor area, it's likely overwatering won't be an issue. Therefore, you don't need to add drainage holes.
• If the planter will be located in an uncovered outdoor area, overwatering can be an issue. So drainage holes makes sense.