Propagation: To Pinch or Not to Pinch....., 1 by

wrote:
LALA_JANE
Pinch the following varieties. Some on your list I'm not familiar with so can't advise. I don't grow many annuals anymore. Mainly perennials.
Browallia
Heliotrope
Phlox - annual
Abutilon
Mimulus tigrinus (monkey flower)
Torenia
Lobelia
Lobelia - trailing variety
Salvias - both splendins and coccinea
zinnias
marigolds

Salvias (perennial) can be deadheaded to bloom again. Actually, I shear down my plants 2-3" down to get rid of all the developing seed heads before they are ripe.

The photo is perennial Salvia superba x 'Blue Queen' . Drought resistant and hardy zones 4-8. Blooming begins in June. I pinched it as a seedling. From there, it doesn't need it as the clumps enlarge every year, producing more branches on its own.