Lupines and Aphids
I have a lovely huge lupine plant, planted in May of 2013 and just going gangbusters this summer. I had gorgeous flower spikes and a beautiful bushy plant, very dense. Last year it had aphids, which I didn't discover until it was serious, so this summer I've been checking, and sure enough, they were back. I've trimmed back a lot of the foliage that wasn't looking healthy, and I keep spraying what is left with detergent and water, and I think I'm winning (spiders are helping, too), but I wonder if the lupine would suffer from being severely cut back until I can get this infestation eradicated. It's still growing new leaf stalks; if I cut back the main stalks (that were the flower stalks) and trimmed much of the foliage up off the ground, would I be hurting the plant? I love lupines, and this one is truly a treasure if this year's growth is any indication.
Which is worse: pruning or aphids?