How to Water Houseplants While on Vacation

The Core Principle: Compare Trip Length to Normal Watering Interval

The safest way to plan vacation watering is to compare your trip length with each plant's normal watering interval rather than relying on a fixed number of days. A plant normally watered every 7–10 days may tolerate a short trip after thorough watering, while a plant normally watered every 2–3 days will need supplemental watering sooner.

Step 1: Reduce Water Loss Before You Leave

Plants lose water through transpiration, which is driven by light, heat, and air movement. Before you leave, move your plants away from intense direct sunlight to a cooler location with suitable indirect light for the species. Grouping them together can increase local humidity and reduce water loss, depending on room conditions. Lower light can slow growth and may cause some plants to become leggy if the reduced-light period is prolonged. Restore their usual lighting conditions when you return. Drawing sheer curtains or keeping the house slightly cooler can also help reduce water loss.

Step 2: Water Before You Leave

Water plants according to their normal needs shortly before departure, allowing excess water to drain completely. Avoid overwatering just because you're leaving—too much water can be as damaging as too little. For trips that do not exceed a plant's normal watering interval, a thorough watering before departure is often sufficient.

Method: The Capillary Wick (For Moisture Lovers)

For plants that need consistent moisture during an extended absence, a capillary wicking system can provide supplemental moisture.

1. Fill a large bowl, bucket, or gallon jug with water and place it on a stand or table higher than the plant pot.
2. Take a length of absorbent cotton string, fabric cording, or garden twine. Soak the cording in water first.
3. Bury one end of the cord a couple of inches deep into the plant's soil.
4. Place the other end of the cord deep into the water reservoir.
5. Capillary action will slowly pull water from the bowl down the cord and into the soil, keeping it moist.

Pro tip: Always test any DIY watering system before relying on it during a trip. The duration depends on the reservoir size, wick material, plant water use, and environmental conditions.

Method: The Humidity Enclosure (Plastic Bag)

For smaller plants, you can create a mini greenhouse effect. Water the plant well, then place a clear plastic bag over the plant and pot, sealing it at the bottom. Use chopsticks or bamboo skewers to keep the plastic off the foliage. The plastic enclosure increases humidity and reduces water loss, allowing the potting mix to dry more slowly. It does not replace normal drainage or guarantee that the plant will remain adequately watered for a specific number of days. Keep these bagged plants entirely out of direct sunlight, or they will overheat. Leave some space for air circulation and avoid sealing foliage against wet plastic.

Alternative: Watering Globes and DIY Bottle Drip

Watering globes can provide a slow release of water. You can also create your own: take an empty bottle, punch a small hole in the cap, fill it with water, and place it upside down into the soil near the base of the plant. Test any system before you leave to ensure the water release rate is appropriate for your plant.

Test Your Vacation Watering System Before You Leave

Never rely on a DIY watering system for the first time on the day you travel. Set it up several days in advance and check whether the potting mix is becoming too wet or too dry. Adjust the wick, reservoir height, or water volume as needed. This is especially important for sensitive plants because an incorrectly adjusted system can cause either drought stress or waterlogging.

Avoid Major Changes Before You Leave

Avoid repotting, aggressive pruning, fertilizing, or making other major changes immediately before a trip unless necessary. Plants are easier to monitor when their growing conditions remain stable, and newly repotted plants may have different water requirements.

What NOT to Do

Do not fill your bathtub with water and place all your potted plants inside. Keeping pots continuously submerged can deprive roots of oxygen and create waterlogged conditions that increase the risk of root damage. While this is a popular internet hack, it is not recommended.

When to Call a Plant Sitter

For extended trips or valuable, sensitive plants, the most reliable option is to ask a friend, neighbor, or plant-sitting service to check on your plants. This ensures your plants receive attention and any issues can be addressed promptly.