Lots of notes as tough start, especially to germination, tried wet paper towel in two plates in airing cupboard and propagator, stayed moist but struggled. I think the seeds were quite old as well. 1 yr since purchase. Tried same method with coffee filters and both seeds a success. Coffee filters provide more porosity for air to the seed. Kept light on 24 hrs for first couple of days due to cold outside temp. Slightly over the 20-25C range, also under the humidity range 65-70%, both because sharing with another plant at week 3 that needs those ranges, i instead sprayed with water to keep humid. Humidifier also on. SS started in small pot and transplanted to same soil by lining the bed, ensured the pots weren’t too moist and cut gently out of the pot to avoid disturbance to roots, also did just before dark period to avoid additional stress - success!