Taller varieties of nonbranching, also called single stem, sunflowers like the 'Procut' and 'Sunrich' series are the best types of sunflowers to use as garden supports, thanks to their single ...

In the fall, carefully prune the dahlia back until it’s a stump, then gently ... snip the stem just above the leaf nodes, says Walz. Remove the flower head and lower leaves.