By our calculations, you should look at sowing Platinum about 105 days before your last frost date.
Rare, named, heritage (heirloom) variety of variegated Single Zonal Pelargonium, originally called ‘Harriet Le Hair’.
An old-fashioned single pelargonium, with fancy foliage.
Currently being marketed and sold as ‘Fancy leaf Pelargonium, var. ’Platinum’.
Most houseplants commonly called ‘Geraniums’ are, Botanically speaking, not geraniums but Pelargoniums.
This old-timey variety has been reintroduced recently under the newer marketing name Pelargonium ‘Platinum’ recently, by Shady Hill Gardens in Elburn, IL.
Harriet Le Hair, Headley’s Sport, Fancy leaf Pelargonium var. ’Platinum’, Fancy leaf pelargonium, Fish geranium