How To Grow Rudbeckia From Seed. If youre starting a new patch plant them in fall or for spring plantings treat them to a period of cold stratification for 30 to 90 days prior to sowing. Sow seeds from February to July in trays or pots of good seed compost at a temperature of 65-70F 18-20C.
If youre starting a new patch plant them in fall or for spring plantings treat them to a period of cold stratification for 30 to 90 days prior to sowing. Sow seed in early spring and keep seedlings under cover until large enough to handle and pot on then harden off after danger of frost has passed. Fill up your seed tray with preferably peat free compost.
I live in 7b but should get cold enough here I would think if it gets cold enough for purple coneflowers.
The few times people have sent me their saved seeds though the seeds werent viable. The few times people have sent me their saved seeds though the seeds werent viable. Growing Rudbeckia from seed As with all Asteraceae species growing Rudbeckia from seed is easy and they reseed themselves if you leave their cones. Sow seed in early spring and keep seedlings under cover until large enough to handle and pot on then harden off after danger of frost has passed.