![Melissa Starkey This undated photo provided by Mt. Cuba Center shows the Hockessin, Del. botanical garden's formal South Garden, planted entirely with native plants and cultivars of native plants, including: Penstemon, Thalictrum, Tradescantia, Liatris, Monarda, Amsonia, Artemesia, Baptisia, Eryngium, Physocarpus, Redbeckia, Solidago and Eryngium species. (Melissa Starkey/Mt. Cuba Center via AP)](https://mapi.associatedpress.com/v2/items/0cb148de6b7a416a88ca38cc4f4e592a/preview/preview.jpg?s=680x)
This undated photo provided by Mt. Cuba Center shows the Hockessin, Del. botanical garden's formal South Garden, planted entirely with native plants and cultivars of native plants, including: Penstemon, Thalictrum, Tradescantia, Liatris, Monarda, Amsonia, Artemesia, Baptisia, Eryngium, Physocarpus, Redbeckia, Solidago and Eryngium species. (Melissa Starkey/Mt. Cuba Center via AP)
![Alessandra Stokely This undated photo provided by Mt. Cuba Center shows formal native plantings, including Asclepias tuberosa, Echinacea purpurea, Liatris, Physocarpus opulifolius and Artemesia ludoviciana, flanking a walkway at Mt. Cuba Center botanical garden in Hockessin, Del. (Alessandra Stokely/Mt. Cuba Center via AP)](https://mapi.associatedpress.com/v2/items/98248772b2dc4a73a5b499494c830e75/preview/preview.jpg?s=680x)
This undated photo provided by Mt. Cuba Center shows formal native plantings, including Asclepias tuberosa, Echinacea purpurea, Liatris, Physocarpus opulifolius and Artemesia ludoviciana, flanking a walkway at Mt. Cuba Center botanical garden in Hockessin, Del. (Alessandra Stokely/Mt. Cuba Center via AP)
![Alessandra Stokely This undated photo provided by Mt. Cuba Center shows formal native plantings, including Asclepias tuberosa, Echinacea purpurea, Liatris, Physocarpus opulifolius and Artemesia ludoviciana, flanking a walkway at Mt. Cuba Center botanical garden in Hockessin, Del. (Alessandra Stokely/Mt. Cuba Center via AP)](https://mapi.associatedpress.com/v2/items/7ed3ce98057e4069bacd8f07ac6927ce/preview/preview.jpg?s=680x)
This undated photo provided by Mt. Cuba Center shows formal native plantings, including Asclepias tuberosa, Echinacea purpurea, Liatris, Physocarpus opulifolius and Artemesia ludoviciana, flanking a walkway at Mt. Cuba Center botanical garden in Hockessin, Del. (Alessandra Stokely/Mt. Cuba Center via AP)
![Melissa Starkey This undated photo provided by Mt. Cuba Center shows the Hockessin, Del. botanical garden's formal South Garden, planted entirely with native plants and cultivars of native plants, including: Penstemon, Thalictrum, Tradescantia, Liatris, Monarda, Amsonia, Artemesia, Baptisia, Eryngium, Physocarpus, Redbeckia, Solidago and Eryngium species. (Melissa Starkey/Mt. Cuba Center via AP)](https://mapi.associatedpress.com/v2/items/81fa4da71443432192588d6fc6927f57/preview/preview.jpg?s=680x)
This undated photo provided by Mt. Cuba Center shows the Hockessin, Del. botanical garden's formal South Garden, planted entirely with native plants and cultivars of native plants, including: Penstemon, Thalictrum, Tradescantia, Liatris, Monarda, Amsonia, Artemesia, Baptisia, Eryngium, Physocarpus, Redbeckia, Solidago and Eryngium species. (Melissa Starkey/Mt. Cuba Center via AP)