Your selections—Machaeranthera (tansy aster), Mexican Gold Poppy (Eschscholzia mexicana), and Penstemon species—are excellent choices for a native wildflower garden. They are adapted to the region's climate, soils, and pollinators.
Since my expertise is houseplants, I recommend consulting:
Good luck with your beautiful project!
Native Prairie Wildflowers for a Sunny, Dry School Garden in New York
Carnivorous Plants Native to Oregon
Cats and Houseplants: Balancing Safety and Sanity
Chlorine Effects on Plants: Science Project Guide
Choosing the Right Gardening Plants for Year-Round Beauty and Utility
Plants for Swampy, Spring-Fed Areas in West Virginia
New Gardener's Guide: Pruning Rhododendrons, Blueberries & Weed Control
Spring Trees and Shrubs: Designing for Blossom, Fruit, and Fall Color
Bonsai Gardening: Choosing and Shaping Miniature Trees
Native Garden Design: Create a Seasonal Landscape with Indigenous Plants
10 Outstanding Native Shrubs for Four-Season Mid-Atlantic Gardens
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