Can you name every item on the cover of our April newsletter?

To decode the mystery, we're offering an A to Z reference. See below.

asparagus
blueberry
carrot
daisy
eggplant
fern
grass
hibiscus
iris
juniper
kale
lavender
marigold
nasturtium
orchid
pumpkin
quince
rose
strawberry
tomato
Umbellularia californica (bay leaf)
viola
watermelon
xylosma
yam
zucchini