Spice, Herb, or Vegetable Beer Hipster Ale - Hibiscus & Ginger Ale (Top 10 Bell's Competition Finisher)

I've brewed this beer twice now for competitions, originally it was done for the Michigan Iron Brewer (they chose Hibiscus & Ginger as mystery ingredients) and later I rebrewed it for Bell's competition and got a top 10 finish (out of 143 entries).

Full write-up and downloadable beer.xml is here: http://inspiredfermentations.com/hipster-ale/

The re-brew of it for Bell's was a tweak on the original, I'm not sure I'd change much at this point really, if you wanted to up the malt backbone (which was a comment in the Bell's feedback) something like Vienna or Munich replacing some or all of the the base malt.

Recipe Specifications
--------------------------
Boil Size: 6.04 gal
Post Boil Volume: 5.99 gal
Batch Size (fermenter): 5.50 gal
Bottling Volume: 5.00 gal
Estimated OG: 1.058 SG
Estimated Color: 13.7 EBC
Estimated IBU: 20.8 IBUs
Brewhouse Efficiency: 70.00 %
Est Mash Efficiency: 73.2 %
Boil Time: 60 Minutes

Ingredients:
------------
Amt Name Type # %/IBU
10 lbs Pale Ale (BestMälz) (5.0 EBC) Grain 1 78.4 %
1 lbs 4.0 oz Cara-Pils/Dextrine (3.9 EBC) Grain 2 9.8 %
12.0 oz Caramel/Crystal Malt - 20L (39.4 EBC) Grain 3 5.9 %
8.0 oz Golden Naked Oats (19.7 EBC) Grain 4 3.9 %
4.0 oz Honey Malt (49.3 EBC) Grain 5 2.0 %
0.50 oz Centennial [10.00 %] - Boil 35.0 min Hop 6 13.0 IBUs
0.50 oz Centennial [10.00 %] - Boil 15.0 min Hop 7 7.8 IBUs
1.00 oz Ginger Root (Boil 10.0 mins) Herb 8 -
8.00 oz Hibiscus (Boil 5.0 mins) Flavor 9 -
1.0 pkg California Ale (White Labs #WLP001) [35. Yeast 10 -


Mash Schedule: BIAB, Medium Body
Total Grain Weight: 12 lbs 12.0 oz
----------------------------
Name Description Step Temperat Step Time
Saccharification Add 6.97 gal of water at 159.1 F 152.1 F 75 min
Mash Out Heat to 168.0 F over 7 min 168.0 F 10 min

What sort of hibiscus do you use? Dried? Where do you get it from/in what form? Thanks!

Was dried hibiscus like you'd use for tea. You can find it on amazon.