The "Giant Himalayan Cowslip" bears large rounded leaves and stout stems carrying immense heads of fragrant flowers which are usually yellow but very occasionally red or orange. This is almost certainly the biggest primula there is and in a damp soil will make impressive, self-seeding clumps!
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.