Size - Measure out what you exactly need & what plants you are going to place in them! Buying the wrong size planter may lead to plants not having sufficient space to grow efficiently. Color - If you need a specific color, we are able to provide you with custom colors! Send us an RAL color code and we'll paint your planter in that color! We also have stock colors available. Drainage - If the planter you choose is going to be used outdoors, we recommend you have drainage holes added to your planters. This will keep out dirty water and will keep your plants healthy. Weight - You should take into consideration the broad array of places you will use it in. Fiberglass planters weigh less than aluminum. You should also consider the overall weight of the plants, soil and water.