How to keep plants fresh in late season?
So this year has been quite dry on the east coast. When I cut sprigs of swamp milkweed, no sap bleeds out; all of the spicebush has gone woody-stemmed.
The downside of this is that when I put cut sprigs in water (lunchmeat containers filled with water), they dry out quickly -- 2 days max.
By contrast, back in June, even when the temps were as hot as now, the plants would stay mostly green for 4 - 7 days.
Is there any secret to helping them stay green in water?