Also, why do you need bags for seed potatoes?
Asparagus has a long arduous process of growing, but can be very fulfilling. You need to make sure you plant it correctly and then for the next 4-5 years make sure you pick it correctly. First 2 years you usually don't pick asparagus to give its roots time to grow, but if you purchase 1-year old roots to plant then you have to wait only 1 more year after planting. Then in year 3 you can pick for about 3-4 weeks then stop picking. In year 4 you can pick for 4-6 weeks. Then in year 5, you can pick all season long which is about 6-8 weeks.
Also, certain plants don't like to get too much water...like tomatoes. If you water tomatoes too much then the fruit will get black rot. I always mulch around my tomato plants with wet newspapers and then put straw on top of that. I do water them early on, but once they start to produce fruit you don't want to water to much.
I also water with miracle grow about once per week.
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As far as pest insects, you can find natural pesticides at most stores.
Also, thanks for the kind words