### Instruction:
I need to work out which of the following plants are edible and which are not: coleus, dandelions, yellow oleander, foxglove, roses, deadly nightshade, forsythia, begonia, angel's trumpets.

### Response:
Yellow oleander, foxglove, deadly nightshade, and angel's trumpet are all poisonous plants and should not be eaten. Coleus, dandelion, roses, forsythia, begonia are edible plants.