These are the top 2 orange flowering plant flowers to grow in your garden given here:

1. Montbretia: Its scientific name is Crocosmia x crocosmiiflora. Its USDA growing zones are 5 to 9 and height goes up to 3 to 4 feet.
2. African Tulip Tree: Its scientific name is Spathodea campanulata. Its USDA growing zones are 10 to 11 and height goes up to 20 to 25 feet.