My First Grow

Hi. I'm new, if you hadn't noticed. I'm planning on growing for the first time and wanted a few pointers and guidance to get me through this, so I joined this forum. I've read just about every outdoor grow guide I can find, but feedback would be great! I've purchased some seeds which should be here in a few days.

My seeds
Nirvana seeds Northern Lights
Autoflower: Yes
Harvest: 7-9 weeks
Strain: Hybrid, Predominately Indica
Genetics: Northern Lights

Barney's Farm Amnesia Lemon
Autoflower: No
Harvest: Early October
Strain: Dominant Sativa Hybrid
Genetics: Skunk #1 X Amnesia Haze

Barneys Farm Crimea Blue
Autoflower: No
Harvest: End of September
Strain: Mostly Indica Hybrid
Genetics: Ukraine x Blueberry

Sweet seeds Flash Back #2
Autoflower: No
Harvest: End of September
Strain: 40% Indica, 60% Sativa
Genetics: Flo X White Widow

Lowryder Diesel Ryder
Autoflower: Yes
Harvest: 8 to 9 weeks
Strain: Hybrid
Genetics: New York City Diesel x Lowryder #2

Delicious seeds Sugar Black Rose
Autoflower: No
Harvest: Mid September
Strain: 80% Indica, 20% Sativa
Genetics: Critical+ X Black Domina

Lowryder Easy Rider
Autoflower: Yes
Harvest: 8-10 weeks
Strain: Hybrid
Genetics: AKA Lowryder #2 x AK47

Barneys Farm Violator Kush
Autoflower: No
Harvest: End of September
Strain: Mostly Indica
Genetics: Malana x Hindu Kush

Barneys Farm Critical Kush
Autoflower: No
Harvest: End of September
Strain: Indica dominant
Genetics: Critical+ X O.G. Kush

Barneys Farm Pineapple Chunk
Autoflower: No
Harvest: End of September
Strain: Indica Dominant
Genetics: pineapple X skunk#1/cheese

Delicious seeds Critical Yumbolt
Autoflower: No
Harvest: Mid September
Strain: 75% Indica, 25% Sativa
Genetics: Yumbolt X Crtitical+

Grass-o-matic AK
Autoflower: Yes
Harvest: 8-10 weeks
Strain: Mostly Indica
Genetics: AK-47 x Lowryder

Barneys Farm Auto Blue Mammoth
Autoflower: Yes
Harvest: 70 days
Strain: Indica
Genetics: Skunk#1 X Blue Cheese X Siberian

Dinafem seeds Diesel (NOT FEMINIZED)
Autoflower: No
Harvest: October
Strain: Mostly Sativa
Genetics: Mexican Sativa x Afghani.

EVA seeds Monster
Autoflower: No
Harvest: Mid/End October
Strain: Mostly Sativa
Genetics: South American hybrid and a G13

G13 Labs Skunk #1
Autoflower: No
Harvest: Late October
Strain: Mostly Sativa
Genetics: stabilized Skunk #1

I tried selecting strains that would be ready before the corn harvest season (mid October- early November) to avoid detection. I wanted to try a variety so I got some autoflowers and a mix of sativas/indicas. I probably won't try to grow the free seeds with harvest dates after early October.

Growing Location
40-41 degrees latitude
last average frost: May 5th
first average frost: October 15
hot, humid summers; variable rain
south side of small creek bed (has never flooded) on edge of corn field
sandy/silt loam soil, very little clay

Germination
I'll first be soaking seeds for 24 hours, then planting indoors in Solo cup. I'll be moving outdoors after 2ish weeks or after planting/spraying of corn in done.
When do they need light? Should they be grown in same soil as outdoors or can I use straight Promix potting soil from Wal-Mart?

Planting
Digging out 2' X 2' X 1.5' hole, adding back in half the soil that was removed and mixing with...

Tentative Soil Mix [per plant]
50% local soil [3.0ft³]
15% aged horse poo composit [0.9ft³]
15% Earth Worm Castings [0.9ft³]
10% Vermiculite [0.6ft³]
10% Perlite [0.6ft³]

Does this need time to set? Anything else I should definitely add?

Vegetative fertilizers: none, just watering?
Flowering fertilizers: some form of P and K, perhaps?

I have to walk about a mile to the grow site, so I want to keep weight (and cost) in additives/nutrients to a minimum. The water is going to be supplied from the creek. I'm also restricting nutrients to things I can readily find at superstores (Wal- Mart, Lowes). Since this is a rural area, we don't have specialized garden center stores. The soil is very rich and fertile already so I don't think I'll have much problem growing a native weed. I'll be buying some litmus strips to double check the pH and will add lime as needed.

Thanks for any feedback! I'll try to keep this updated as I progress.
P.S. Hope this wasn't too long for a first post.

^^^ looks like I f'kd that all up! not sure how to fix it, but youll get the picture