The Vertical Stacking Planter is a great idea to create an ecosystem of plants in a limited space. The Pots are so designed that when stacked together, they produce a column of multiple growing facets of plants. Each pot has 3 planting sections, thus comes with 9 planting areas if 3 stacking pots are ordered. The pots can be easily separated and reformed. The overflow points in each pot enable water to seep down to lower levels. Self Watering grid in each Pot retain the water in base well of the pot, providing a controlled feed via the natural capillary action of the soil. This helps maintain a balance of moisture in the growing medium over a prolonged period. Self watering grids help retention of the moisture and thus help in constant supply of nutrition to the plants. Watch out the moisture in the potting medium in order to know when the plants should be watered again. You can of course stack more pots, even up to 5. We will be able to ship you more pots of your choice colors if you let us know in advance at the time of booking your order. Many plant lovers may have questions related to the type of Plants which would fit the size of these Pots. Please send us a message and we will be happy to answer all your questions. Please remember, we wish that you understand every aspect of our products and clear all your doubts at the time of buying them. We are pleased to offer multi color options. The stacking pots come in six different colors and bottom trays come in four different colors; please refer to the attached pictures. Please send a seller message immediately after booking the order informing about your color choice. If we do not get any buyer message within 3 hours of booking order, then we would randomly select the colors and ship the item.