Blossoms/immature fruit on peppers (and toms and eggplants etc) will also drop if the temperature is too low. I think it's average temps that matter, so you have to consider both daytime and nighttime temperatures as well. Peppers love heat, and the temperatures you describe are not all that high. I think if you are patient you will find fruit starting to set and mature as the season goes on. I would consider this early in Spring quite early to be getting pepper crops, but I'm not sure where you're located

Didn't expect that she did have a greenhouse, Ken. Winter growing in my latitude doesn't provide the optimal conditions that many annuals need but New Guineas tolerate it well, and that means even though most people think of them as bedding plants only, they can be pretty successful grown as houseplants, certainly easier than the garden variety-busy Lizzie. You direct her to the houseplant forum saying you might be wrong, but have an issue when I comment on them, even though I've grown thousands of them over several decades? ;-) You are correct in saying not to get too attached to it, because they're not expensive, and to keep them beautiful inside requires a learning curve. I'd say worth a try. You don't need high humidity, just don't put them in a furnace draft where they'll get heater scrub. They'll protest if they're underwatered, and they'll protest if they're overwatered, and if the light level isn't high enough, you won't get bloom. But no more difficult than some other persnickety houseplants. This post was edited by calliope on Fri, Sep 12, 14 at 2:33

Possibly Coreopsis auriculata 'Schmittgold' ?

Is this the allium you saw at Olbrich? I photographed it a week or so ago. Here is a link that might be useful: Flowering Onion