Volunteer penstemon and non-volunteers
Last October I planted Penstemon superbus and P. parryi x superbus from a plant sale. Both bloomed in spring and I let them set seed. I cut both to "rosette" and cut back on summer water but while the P. superbus (Ps) did well, the P. parryi x superbus (Ppxs) looks dead.
With our end-of-monsoon rains, I noticed four seedlings around the "dead" Ppxs and only one seedling near the Ps.
Assuming seedlings should be about 12 inches apart, I am going to have to transplant a couple of the seedlings. At what stage would it be best to try to move them?
Should I pull out the dead-looking Ppxs or wait until next spring to see if it "comes back"?
In addition to self-seeding germinations, I also saved some seed and scattered it nearby. Should I be watering that area to try to coax out some non-volunteers? Does a 2-gallon springling can of water each evening seem like enough?