Self-Watering PlantsSelf-watering bulbs slowly release the perfect amount of water needed into the soil to nourish flowers, herbs and other plants. Depending on soil density, water lasts 14 days, effectively preventing plants from being over or under watered. Perfect for indoor and outdoor use. Suitable Size Flower WateringThe plant watering balls are 20cm or 7.8inch in length and 7cm or 2.8inch in diameter. Perfect size for pouring directly to the roots, preventing rapid water loss. Healthier than soaking surface plants. Decorative Plant WateringThe plant watering device is made of high density and super durable glass. Plant waterers not only water plants, but with special patterns, they can also decorate your house or your garden while being practical. Easy to UseJust fill the bulb with water and poke a hole in the ground with a stick to prevent soil from clogging the tube. Then insert the bulb into the hole and it will automatically drip to water the plant. The rate draining time depends on conditions, soil and type of plant. They are a favorite plant helper for travelers and people who always forget to water their plants. Darling Gardening GiftEfficient automatic watering stakes are thoughtful gifts for gardeners and housewarming, holiday gifts for friends and family who love gardening. Water polo is ideal for potted plants, indoor plants, garden plants, hanging baskets.