Self-Watering Spikes, Watering Spikes with Slow-Release Control Valve for Indoor and Outdoor Plants, 24-Pack

The flow rate can be controlled. The plant watering Device with control valve can control the dripping speed of 0-60s/drip . and the sustained drip lasts for 1-15 days. Only adjust the valve to Meet your needs without complicated setup steps. Installed without any tools . just drill some holes in the bottom of the bottle or cut the tail of the bottle to keep the air flowing.Loosen the slow release control valve switch on the regulating valve according to the irrigation needs.