I don't know if they're going to bloom at all given the two weeks of 90+ heat that we've mysteriously had this spring, but it's worth a shot... I planted a bunch of sweet peas at the edge of some window boxes. The boxes are in front of a screened-in porch, above a foundation planting of roses, perennials, annuals and shrubs. I'd really like them to trail downwards to the ground (I don't mind if they grab onto each other) but I'm wondering if, as with the morning glories in another post, they really really want to grow up instead.

I was thinking of tying a bunch of pieces of fishing line to the container, weighting the line with a large screw etc. at ground level, then training the sweet peas down that. Will that work? Or should I switch the containers so the sweet peas are in back, and run fishing line upwards to the roof of the porch so they just grow up that way? They were fairly vigorous until they reached about 9 inches or so, and they've stalled a bit since (although that could very well be the heat too.)

Thanks for your advice!