★ Product introduction: Plant Watering Spike Made of ABS plastic material, durable and sturdy. It won't break and can last for a long time.Easy to use and control the speed of water flowing. Just watch out the water output. We suggest 1 small holes are enough. ★ Plant Watering Spike Working principle： ➊ Fill the PET bottle and insert it into the soil, then water will flow out from the hole 1 and the hole 2 due to hydrostatic pressure. ➋ The soil absorb water in the bottle and gradually the pressure in the bottle will decrease, and then the water will stop flowing out. ➌ When the pressure in the bottle is lower than the outside, air will get into the bottle through hole 2, then the pressure in the bottle will revert to the previous state and the water continues to flow out. ★ Notes： ➊ Do not cut off the nozzle tip. ➋ The further the distance between two holes,the faster the speed of watering. ➌ Do not make too many holes, it will run out in a couple of minutes. ➍ The spikes come with no hole, you need to pierce it by yourself. ➎ plant spike will normally work for 4 days. But Garden watering device also related with the weather, soil humidity, bottle size and holes quantities. ★ Package included： ➊ 8 * Water spikes
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