New to orchids, and I have a question about my only orchid friend

[lulu]

I bought my first orchid a few weeks ago at Lowe's (pretty much like Home Depot, in case they are not in your area). It's a phal, and I got it because there were TWO happy-looking phals in the pot, one of them with two beautiful blooming stalks. Couldn't walk away from it!

Anyway, I have been watering it once a week and both of the stalks have lost all their flowers. One stalk is dead-looking, the other still looks quite vital. The plant that was not blooming originally is putting out a new stalk that's covered with buds, which is very exciting for me as a newbie.

I have not re-potted, nor even checked the innards of the pot.

I live in Maryland, where it is usually in the upper 80s to mid 90s during the day this time of year. It's not uncommon to have a few days with the hear index hovering around 100. It's often pretty humid here. My phals are on the front porch which is North-facing and covered. They are in a corner, close to the house, up on a plant stand that allows air circulation all around, including below the pot.

Should I take the new stalk as a sign that my conditions are all good? Or should I do a bit more homework and make adjustments to make my new friends feel really welcome?

Thanks for your advice.