You can leave it in the carboy for months.
Here is a recipe
Extract - Scottish Ale (60/-) extract
Recipe Type: Extract
Yeast: Safale US-05
Batch Size (Gallons): 5.0
Original Gravity: 1.056
Final Gravity: 1.016
IBU: 21
Boiling Time (Minutes): 60
Color: Dark crimson
Primary Fermentation (# of Days & Temp): 10 days at 64F
Tasting Notes: mmm
starting batch size 6 gallons
batch size after boil 5 gallons
Grains (bag) steeped 45 minutes (until 170F, then removed)
1 lbs 120 L Crystal Malt
.5 lbs 10 L Crystal Malt
.15 lbs Roasted Barley
Extract - boiled 60 minutes
7 lbs Pale Malt Extract
Hops - 60 minutes
Hops 1 oz Kent Golding
yeast - pitched at below 70F
Safale US-05 (hydrated in 2 oz pure water)
link
Make sure you steep your grains at around 160f, If you just throw them in the boil they will release tannins= the off taste I had. Anything over 170f is bad.
Download the trail version of
Beersmith too.