In our gardens at Plant World we grow the lovely old-fashioned primrose 'Garryarde Guinevere' which carries bright pink flowers above deep purple leaves. Our busy bees carried pollen from these old plants, which are themselves sterile and produce no seed, to a bed of our yellow 'Devon primrose' or Primula vulgaris. One of the subsequent seedlings was a lovely hybrid between the two, bearing large, floppy, pale pink flowers, on darker stems, over a rosette of palest purple leaves. Seedlings may vary slightly but all will be lovely.
Primula seeds may be sown in good light conditions at any time onto a loam-based compost, barely cover so that around 50% are still visible. We never use artificial heat, primulas are COOL germinators! As a rule best temperatures are usually between 10 and 15 degrees C. (e.g. a cool greenhouse or northerly window sill) PLEASE NOTE: Temperatures exceeding 15 C can prevent germination, and above 20 C expect very little germination as seeds can go dormant as a protective measure. Germination can take up to 6 weeks, but sometimes takes much longer.