Plant notes
Why Drainage Holes Actually Matter (And What Happened When I Ignored This)
I killed three perfectly good pothos plants before I properly understood drainage holes. Not because I'm a terrible plant parent, but because I thought I could just 'water carefully' and skip the holes. Spoiler: you can't, and I learned this the expensive way.
What drainage holes actually do
Drainage holes let excess water escape from the bottom of the pot. This sounds obvious, but the key word is 'excess.' Even if you measure your water perfectly, soil doesn't absorb evenly. Some parts stay wetter longer, especially at the bottom where gravity pulls everything down. Without an exit route, that water just sits there, and plant roots sitting in water rot. It's not about overwatering versus underwatering—it's about where the water goes after you pour it in.
My cachepot phase and why it failed
I went through a phase where I bought beautiful pots without holes and just put nursery pots inside them. This works fine until you forget there's water pooled at the bottom of the decorative pot. I'd water my monstera, think I was being careful, and not realize there was half an inch of standing water beneath the nursery pot for days. The plant got root rot anyway. Now I either drill holes in decorative pots (ceramic bits work fine for this) or I'm extremely vigilant about dumping out the cachepot after every watering, which honestly feels like more work than just using proper drainage.
The 'but I'll just water less' myth
I really believed I could get away with no drainage if I was just precise with watering. Measured out exactly 200ml every week for my snake plant in a sealed ceramic pot. It died. The problem is that you're trying to add exactly the right amount of water that the plant will use before it goes stagnant, but that amount changes with seasons, humidity, and plant growth. In winter my flat is drier, in summer more humid. The plant uses different amounts of water accordingly. Without drainage, you're constantly guessing, and eventually you guess wrong. With drainage holes, you can water thoroughly and let the excess leave—much more forgiving.
What I actually do now
Every pot I use has drainage holes. I put saucers under them to catch water, wait fifteen minutes after watering, then dump the saucers. For my heavy pots, I put them on plant trolleys so I can wheel them to the sink, water thoroughly until water runs out the bottom, let them drain, then wheel them back. Is it a bit more effort than just pouring water into a sealed pot? Yes. Do my plants actually survive now? Also yes. I've also started drilling holes in thrifted pots I like—it's easier than I expected and means I can use pots I actually find attractive rather than just accepting whatever comes with drainage.
Questions people ask me
Can't I just put rocks at the bottom instead of drainage holes?
No, this doesn't work. I tried it with my first fiddle leaf fig. The rocks create a water reservoir at the bottom, which is actually worse than just soil because now you definitely have standing water under your roots. Water doesn't magically jump from soil into rocks and evaporate—it still saturates the lowest layer of soil right above the rocks. You need an actual exit point for water to leave the pot.
What about self-watering pots?
Self-watering pots are a specific design with a water reservoir and a wicking system that pulls water up as needed. They're different from just a pot without holes. I use one for my pothos in the bathroom and it works well, but it's engineered for that purpose with separation between the reservoir and the roots. It's not the same as a regular pot with no drainage where water and roots mix freely.
How big do drainage holes need to be?
I've found that one hole about 1-2cm wide works for most small to medium pots. Larger pots benefit from multiple holes. My biggest pot (40cm wide) has five small holes spread across the bottom. The goal is just to let water out without losing so much soil that the plant becomes unstable—you don't need huge gaps.