Week in Review - The Sweet and Spicy Edition

I guess it was the hot, rainy weather we've been having compared to last year's drier cooler temps, but the garden is just not producing the way it did last summer.  Our carrots didn't grow.  Our broccoli grew and bolted in one week.  The tomatoes look bedraggled.  Fortunately our butternut squash, pumpkin, peppers, and onions are doing well.  The pumpkin plant is humongous, and we even found one little green pumpkin hiding in there.  I guess each year in the garden is different, and you get what you get.  This year we got this:

Green peppers, sweet peppers (which, if you are in Madison and want some, just let me know), and one tiny head of broccoli.  Last year we had so much broccoli!  It's really kind of sad considering all the work we put in to it.  Oh well.  At least we'll have some zesty sandwiches.

On to running and other workout considerations:
M - 5mi easy recovery from long run last Sunday
T - Strength training
W - 8mi with 2x(800,600,600) at 5-10k pace (Interval paces were: 7:40, 7:23, 7:22, 7:47, 7:41, 7:45 min/mile)
R - 8mi with 40 min marathon tempo (run at 8:48 min/mile average pace), yoga
F - Strength training
S - 18mi with miles 9-12 at marathon tempo (did all of them in the 8:50-9:00 min/mile range) in 2:53:00 (9:37 min/mile overall average)
Su - 5mi easy recovery.  Yoga

I'm feeling good about my training overall.  The next two weeks will also be high mileage, and then I'll cut back for two weeks- the first will be recovery, the second will be for a 1/2 marathon fitness testing race.

The only thing that concerns me is how slow my long runs are.  My goal marathon time is 3:50, which is an 8:48 min/mile average pace.  Do you think that- based on the speed I'm doing my long runs- 3:50 is too aggressive of a goal?  I know you're supposed to do long runs slower than your goal pace, but is 45 sec/mile too slow?  Should I try to speed up my long runs?  I usually finish faster than I start, which I know is good...  Any advice would be welcome!