I share Archie's disappointment and frustration. With me it wasn't until year two that I could boast more than a 50% survival rate. Now things I'm planting are actually growing - yesterday I ate my first ever cucumber, that looked and tasted like a cucumber, it might sound simple, but the sense of achievement is rather good.
If he does move to a gardenless flat, perhaps he could start again with herb pots, cut 'n cum lettuces, tomatoes, peppers and strawberries and build on these little successes.