You'll have to remove the annuals when they're done blooming, though the majority of sunflowers fall into the perennial ... seedling starts to sprout tiny leaves that are four centimeters long ...

Fall leaves changing color on trees are a treat ... You might also leave stems from perennials and plants such as sunflowers for native bees and other beneficial insects to bore into for winter ...

Sunflowers can also be considered a “trap crop," meaning they may lure unwanted insects away from your vegetable crops.