Posted: 09/08/2014 at 18:03
OL, you have permission to kick my ar*e if you already know this, but sweet Williams are biennials ie sow the seed this year and they will flower next year.
In fact it is getting a tad late to sow the seed now......July is really stretching a bit to ensure flowers for next year.
I sow the seed in a nursery bed in the open anytime from March to early summer, then transplant the young plants into the open from around now to September. Next spring lift the plants & plant them where they are to flower......much the as for wallflowers btw.
Don't be too fussy with them....I like to think of them as a pretty weed.
PS. Be prepared for them to self-seed and become a nuisance.