
Tired of being a slave to the watering can all summer? Let me introduce you to the ultimate gardening game-changer: the olla!
An olla is simply an unglazed terracotta pot buried in your vegetable bed with just its neck peeking out. It’s an ancient, brilliant way to deliver water directly to the root zone. That means zero evaporation, no wasteful runoff, and no more daily watering chores!
The best part? The terracotta is completely self-regulating. Water seeps through the porous clay faster when the surrounding soil is dry, and naturally slows down when the soil is moist. Your plants get exactly what they need, exactly when they need it. A single 5-litre pot will hydrate a 50 cm circle, and just three pots spaced a metre apart can keep an entire raised bed perfectly watered for 4 to 5 days during the peak of summer.
You can set your own up in just 10 minutes:
Find your pot: Grab an unglazed terracotta pot (about 20–25 cm across). Make sure it’s unglazed, otherwise the pores will be blocked!
Seal the bottom: Plug the bottom drainage hole tightly using a wine cork and some food-safe silicone sealant.
Plant it: Bury the pot up to its neck, about 20 cm away from the stems of thirsty, deep-rooted plants like tomatoes, courgettes, or peppers.
Fill and cover: Fill the pot with water and pop a flat stone or terracotta saucer over the opening to stop evaporation and keep bugs out.
Within just a few weeks, your plants’ roots will literally grow toward the pot to embrace it! Even during dry spells when the topsoil looks bone dry, your olla will be silently working underground to keep the active root zone perfectly hydrated.
If finding the time to water is the only thing keeping you from growing the kitchen garden of your dreams, this is hands-down the most practical, low-cost trick out there. You can build one cheaply, and the system practically runs itself!