What perennial flower grows to a height above 4 ft. tall and spreads thickly?

Hollyhocks (sp). I planted some this year. They grow about 6%26#039; tall and flower all summer.
What perennial flower grows to a height above 4 ft. tall and spreads thickly?
Many of the so called decorative grasses grow well above 4 feet high and spread rapidly.


If you want flowers there are many bushes that have flowers too.


My favorite site for looking up plants is.


Monrovia.com
Reply:yarrow, aster, astilbe, boltonia, echinacea, bab%26#039;s breath, helianthus, heliopsis, lupine, foxglove, baptisia
Reply:Hydrangea%26#039;s will do that, but they take a couple of years to really reach maturity.
Reply:salvia


lavendar


lantanaReebok