They've died from being overwatered (which leads to mold), and underwatered (I had kept them at work, and the air is particularly dry).
Let's have a moment of silence for the last orchid that didn't survive. It came from the San Mateo farmers market.
I brought home 2 mini orchids from Trader Joe's. I promise to try harder this time, little orchids.
Just for good record keeping, here are the care instructions:
Phalaenopsis Care
Temperature 70-90 degrees day; 60-70 degrees night
Water every 2-3 weeks, keep evenly moist
avoid wet foliage, best to water in the morning
Fertilize 1-2 times per month, less in winder
Light moderate indirect light
I also picked up a basil plant. Only $3 at Trader Joe's, which is comparable to one pack of basil. This one should be easier to take care of it.