Substitutions for organic beer recipe?

Hello everyone,

This is my first post. I'm a complete newbie - I have yet to brew my first batch. I just bought John Palmer's How to Brew and am about 3/4 of the way through. On p.136 he gives a recipe for a porter (one of my favorite styles) which involves steeping specialty grains, including crystal 60 L, chocolate and black malt.

Since chocolate porters are among my favorite beers, I really want to make this. However, I'd like to make it using organic ingredients. Seven Bridges Cooperative carries organic brewing ingredients so I checked there to see if they have everything I need.

They have the malt extract and grains listed in John's recipe. However, they do not have the same varieties of hops (Horizon 12% and Willamette 5%) the recipe calls for.

Does anyone know which of the hops listed on their site would be good substitutes for the Horizon 12% and Willamette 5%?

Also, John didn't specify whole or pellet hops. Is that important in this recipe?

Thanks for your help. I'm really looking forward to making my first batch!

Whole or pellet is entirely personal preference.

The good news is, you can substitute Willamette with Fuggle or Tettnanger. You can sub Magnum for Horizon, but I don't see Magnum on the page you posted.
I got my info here:
Hop Substitution Chart ::: Brew365

Thanks, Vic. That list is very helpful.