---
title: "How to water onion plants effectively"
description: "Onion plants need plenty of water when young, then less as they mature. Learn the best watering techniques and ensure proper drainage for healthy growth."
url: "https://getplanta.com/discover/watering/onion"
published: "2025-11-20T08:44:34.374Z"
modified: "2026-10-07T10:34:32.919Z"
author: "Planta"
image: "https://images.getplanta.com/v1/resize/public/content/-cIW1NUOR9aAsWXxu2eVyw.webp?size=large"
---

# How to water onion plants effectively

## How to water

Onions need a lot of water when first planted, and then want less when the leaves begin to yellow and fall over.

**When newly planted: keep soil slightly moist (but not wet) all the time**

**When leaves begin to yellow: let soil dry up slightly between waterings**

If the soil is too wet - snooze this action, we will remind you again in 2 days.

![](https://images.getplanta.com/v1/resize/public/content/-cIW1NUOR9aAsWXxu2eVyw.webp?size=large)

## Water over the soil

1. Pour water over the soil, using, for example, a watering can or put the plant directly under a tap
2. Continue adding water to the pot until it starts to run out from the drainage holes
3. If you have a tray under the pot when watering, make sure you remove all the collected water afterwards - never let your plant sit in water
4. If you watered under a tap make sure that water has stopped running out from the bottom before putting it back

> Even if onions like water, they need excellent drainage, so make sure that the soil and the pot help excess water to run out.  
> — Planta tip

![](https://images.getplanta.com/v1/resize/public/content/2Ng9HnPRRSOxNV8O9MxJhw.webp?size=large)

## Frequently asked questions

### How often should I water my onion plants?

When onion plants are newly planted, keep their soil slightly moist all the time, but not wet. Once the leaves begin to yellow and fall over, allow the soil to dry up slightly between waterings.

### What is the best way to water onion plants?

Pour water directly over the soil until it starts to run out from the drainage holes at the bottom of the pot. Always remove any collected water from the tray afterwards to prevent your plant from sitting in water.

### Do onion plants need good drainage?

Yes, even though onions like water, they need excellent drainage to thrive. Make sure your soil and pot allow any excess water to run out efficiently.

### When should I reduce watering for my onion plants?

You should reduce watering for your onion plants once their leaves begin to yellow and fall over. At this stage, let the soil dry up slightly between waterings.

## How to Water Onion Plants

1. Pour water over the soil, using a watering can or by placing the plant directly under a tap.
2. Continue adding water to the pot until it starts to run out from the drainage holes.
3. If you have a tray under the pot, make sure you remove all the collected water afterwards; never let your plant sit in water.
4. If you watered under a tap, make sure that water has stopped running out from the bottom before putting the plant back.

---

_Source: Planta (https://getplanta.com), the plant care app for iOS and Android. Download the app: https://getplanta.com/download_