By using the planter box module to extend and create the "Storage and drainage curved base".
The interior can store and drain water effectively , and the waved shape at bottom can carry more weight.
The standard equipment do not contain elevated leg, which is suitable to use for flower nursery and water retain, etc.
One curved base can store about 8 liters of water. It is recommended to lay LECA (Lightweight Expanded Clay Aggregate) and then put the drainage board on to place the medium.
