SSH has some loooooong flowering pheno's, 20 weeks + flowering time is a definite possibility.
I have had some long flowering Mr. Nice Seeds SSH phenotypes ..... but nothing anywhere near 20 plus weeks. That's over 140 days. I had one that took almost 15 weeks and I know of others who had some take 14 to 15 weeks ..... but I have never had, heard of or read of a 20 plus week phenotype.
Super Silver Haze
A champion of champions since winning its hat-trick at the 1997, 1998, and 1999 High Times Cannabis Cups and comprising of the most commercial strains known to the uncivilized world: Skunk, NL and Haze. Such achievements confer an undoubtedly regal pedigree. It has an excellent breed for those who wish to possess the stash of stashes and leaves one gasping for reality. This complex hybrid is in the cutting edge in practical Haze hybrids, designed to astound the grower and consumer alike. Recommendation is unnecessary as most people can not see the Haze for their daze.
Heritage: Super Silver Haze
Category: The Naturals - Old school genetics
Family of breed: 25% Skunk, 25% Northern lights, and 50% Haze
Breeder: Nevil and Shantibaba's
Preferred medium: Bio and Hydro, Indoors and outdoors/greenhouse
Expected yield: indoor expect 450-550 g/m2 but this can easily be outdone - g/hand outdoor 550+ g/plant
Flowering period: Expected finishing time for an indoor grow would be between 8-10 weeks of flowering. In the northern hemisphere by late October and in the southern hemisphere by the mid to late April.
Recommendations: For the experienced growers to the most advanced. Highly valued as a finished product
Special Notes: A winner of multiple awards including 97,98 and 99 HTCC as well as it being called by other names in various different countries such as Amnesia haze, the Bomb etc...
http://www.mrnice.nl/dhtml/strains.php?id=35
Strain Lineage / Genealogy / Family Tree