Skyline Encap Earth Science Wildflower Butterfly & Hummingbird MixBrighten your landscape with a burst of brilliant, colorful flowers. We make it easy with this all in one formula that contains natural wildflower seed, mulch, plant food, and soil conditioners. Our Butterfly and Hummingbird Mix is a carefully selected blend of wildflower species known to attract butterflies and hummingbirds, including zinnia, cosmos, Shasta daisy, sweet William, and black eyed Susan.