It’s okay to water your plants at night. But, regular watering is important for proper plant health and growth, so it should be done consistently during the day.
Nighttime watering can be beneficial in some cases, as mild moisture in the soil helps regulate temperature and prevents sudden temperature changes, which cause stress to plants. Nighttime also provides relief from the scorching summer heat during the day, allowing plants to take full advantage of the water they receive.
However, if there is visible mold or fungi on your plant, then it’s not recommended you water them at night due to increased humidity levels that can promote fungal growth.
Aside from exercising caution with certain plants, nighttime watering can also provide additional benefits, such as preventing insects from gathering around wet surfaces in the middle of the day or limiting leaf burn typically caused by strong sunlight.
In short, both daytime and nighttime watering are equally beneficial for healthy plant growth, but if you’re unsure whether a particular plant needs night-time care, it’s best to discuss it with an expert prior to doing so.