Lobelia By André Karwath aka Aka (Own work) [CC BY-SA 2.5], via Wikimedia Commons
Container Role: Spiller
Amount of Shade: Part Shade
Trailing Lobelia comes in many different shades of blue that cascade down the sides of your pots making them perfect as spillers.

‘Riviera Midnight Blue’ Lobelia is the most electric blue to plant in your containers.
However, it doesn’t like the heat and will sometimes peter out during the hottest days of summer.
Laguna Compact Blue with Eye (Lobelia)*
If you live in the south, look for the Laguna series* which are able to take the heat a little better.
Do not let it dry out and shear after the first flush of blooms to rejuvenate new growth.
Laguna Compact Blue with Eye (Lobelia)*
Note: If you are planning to use Lobelia as a spiller, make sure to check that you are getting a trailing variety. There are some upright Lobelias that will not give the same effect.