Leaves
Persephone kept her contraband in stock and organized for whatever the workers might miss, and with her husband coming earlier every year, she took a break from socializing to ready her wares.
Some items on the list were tough to bottle; sunlight tended to fade quickly down below, and the clouds could drift away if she wasn't quick. But some, like leaves in summertime, were more welcoming.
Persephone smiled as she ran a hand along oak trees, collecting as many leaves as she could find. With her seasonal talents it wasn't hard to regress a few into springtime or color a few leaves red and yellow. Her heart ached at the thought that mortal generations had passed without spring or fall.
She shook her head; now wasn't the time to be sad. Plastering a smile back on her face, the goddess turned to a mighty pine tree, carefully collecting its prickly leaves. With any luck, by the time she got back they'd smell like a crisp fall day or a cold but livable winter night, a perfect little shot to keep the darkness away.
Then the wind blew, scattering what she'd picked, and Persephone cursed. In her excitement, she'd forgotten how fragile leaves were.