Every boxwood needs a drink now and then, but knowing exactly when to grab the watering can—and when to put it down—is key to a happy plant. Are you dealing with a thirsty shrub or one that’s drowning in soggy soil? Here’s a handy guide to help you find that perfect balance. Don’t worry, you’ll develop a “green thumb” feel for it in no time!
Avoid the Extremes: Drought and Soggy Feet
Boxwoods actually need more water than most people realize. Even though those leaves are tiny, there are thousands of them! The hotter the day, the more moisture they lose through evaporation. And since they’re evergreens, they stay thirsty even in the winter. Because boxwoods have shallow root systems, they can’t reach deep into the ground for water, which quickly leads to brown leaves during dry spells. This is especially true if your plant is sitting in a sunny spot where the soil dries out fast. On the flip side, if the soil stays waterlogged, those roots will rot. Your goal is to balance your watering with the local rainfall to keep the soil consistently, lightly moist.
Pro Tip:
Always plant your boxwood in well-draining soil with a solid drainage layer. If your shrub is in a very sunny or windy spot, try to provide some shade during the intense midday sun and apply a thick layer of bark mulch over the root zone to lock in moisture.
When and How Often Should You Water?
The weather and the current soil moisture are your best indicators, but you also need to consider the age of your plant. Young boxwoods need time for their root systems to fully establish.
- Don’t let the soil dry out more than about an inch (2-3 cm) deep.
- On hot summer days, water frequently—sometimes even daily.
- Pay extra attention to plants in full sun.
- Water in the morning; never during the scorching midday heat.
- Avoid using ice-cold water.
- Hard tap water is actually fine! These plants appreciate a little lime.
- In winter, water sparingly and only on days when the ground isn’t frozen.
- Keep the foliage dry to prevent fungal infections—aim for the base of the plant.
- For newly planted boxwoods, water regularly until they are well-established (usually once you see new growth).
Caring for Potted Boxwoods
Potted boxwoods need a bit more attention, especially if they’re on a covered porch or balcony where rain can’t reach them. Even if they are out in the open, container soil dries out much faster than the ground, so you’ll need to be flexible. Generally speaking, this means watering daily in the summer, 1-2 times a week in the spring and fall, and once a week in the winter. When in doubt, use the “finger test” to check the moisture level before pouring. Make sure your pot has a large drainage hole and always empty any standing water from the saucer immediately.
Pro Tip:
During the growing season, combine watering with fertilizing. Dissolving nutrients in the water ensures they reach the entire root ball and can be absorbed by your plant right away.
