hop question

I am brewing this recipe tomorrow and it is my first AG with more than a couple of hop additions. I have never dry hopped anything before. At what point do I add the 3 oz of citra as a dry hop? As soon as fermentation starts or do I wait a couple of days? Maybe use a secondary and add them then? Am I better off using a hop bag for this or not? Thanks in advance.

zombie dust
Batch Size: 6 gallons
Estimated Original Gravity: 1.065
Estimated Final Gravity: 1.018
Estimated Color: 8.5 SRM
Bitterness: 65.9 IBU
Mash Temp: 154 F
60 min boil

Ingredients Amount Item Type % or IBU
11.75 lb 2 Row (2.0 SRM) Grain 81.7 %
1.13 lb Munich Malt - 10L (10.0 SRM) Grain 7.8 %
0.50 lb Carafoam (2.0 SRM) Grain 3.5 %
0.50 lb Caramel/Crystal Malt - 60L (60.0 SRM) Grain 3.5 %
0.50 lb Melanoiden Malt (20.0 SRM) Grain 3.5 %
0.75 oz Citra [12.40%] (First Wort Hop) Hops 17.0 IBU***
1.25 oz Citra [12.40%] (15 min) Hops 21.1 IBU
1.25 oz Citra [12.40%] (10 min) Hops 15.4 IBU
1.25 oz Citra [12.40%] (5 min) Hops 8.5 IBU
1.25 oz Citra [12.40%] (1 min) Hops 1.8 IBU
3.00 oz Citra [12.40%] (Dry Hop 10 days) Hops -
SafAle English Ale (S-04) **
London ESB 1968**

Wait until fermentation slows, then add, you'll get better utilization. No hop bag necessary.

Wait until your fermentation has reached final gravity, then dry hop 5-7 days. I prefer using hop bags. You scoop the bag out once you're done dry hoping and wring it out with clean hands. You let it sit for a bit, cold crash if you can, and you're left with nice clear beer to bottle or keg. Those that keg will sometimes dry hop in the keg as well. I bottle my beer, and when I add the loose leaf or pellet hops, I loose more beer than when using the hop bags.

Personally, I like blending hops, but I won't try to sway you from trying what you want to do with this all Citra beer.