Blumat XL Bottle Adapter Self Watering Spikes for Indoor Plants - Terracotta Self Watering Spikes & Plant Self-Watering Stakes - Plant Self Watering Spikes for Outdoor Plants (2 Pack)

A larger size for larger plants. This one gives about.3 liters (.08 gallon) per 24 hrs. Don't let your plants get too thirsty! Or stay too wet. Recycle and use your plastic bottles to keep the soil moisture just right - your plants will love it! There are many imitations of this original Austrian design - many less expensive but none higher quality.