My planter box has drainage holes, but water is still pooling, what can I do?

“I thought I had it all figured out. My beautiful planter box came with those neat little drainage holes, so I confidently filled it with soil, planted my herbs, and watered them with love. But a few days later, I noticed the water just sitting there, like a tiny indoor pond. My plants looked sad, and I could almost hear their roots gasping. ‘What’s wrong?’ I asked myself. ‘The holes are there—why isn’t the water leaving?’

After some digging (and a little plant therapy), I realized the problem wasn’t the holes—it was the soil, the placement, and a few sneaky details I’d overlooked. Let me walk you through what I learned and how I saved my green friends.

First, I checked if the drainage holes were actually blocked. Sometimes, when you lay a planter box on a solid surface like concrete or a wooden deck, water can’t escape because the holes are pressed flat. I lifted my box slightly and placed a few small pebbles or a wooden slat under the corners—voilà, the water started trickling out!

Second, I looked at my soil. I had used a heavy potting mix that held water like a sponge. To fix this, I added perlite and coarse sand to improve aeration. I also created a shallow gravel layer at the bottom of the box (some gardeners argue against this, but for my setup, it helped big time).

Third, I realized I was overwatering. Plants are like friends—they need space to breathe, not a constant flood. I slowed down my watering schedule and let the top inch of soil dry out between drinks.

Finally, I elevated the entire planter box on small feet or blocks. This gave air a path to travel under the box, speeding up evaporation and preventing that stagnant puddle effect.

Now, my planter box is singing. The water flows freely, the roots are happy, and my herbs are bushy and green. If your planter is acting like a bathtub, don’t panic—just give it a little lift, some loose soil, and a smarter schedule. Your plants will thank you with their lives.”