Can You Use Native Plants in Polyculture Systems?

Native Plant Selection

When selecting native plants for a polyculture system, consider their growth habits, mature heights, and nutrient requirements to ensure compatibility with other species. For a grassland restoration polyculture, choose a mix of grasses (at least 3-5 species) and forbs (1-2 species) that complement each other in terms of growth periods and nutrient uptake. For example, a mix of tallgrasses like big bluestem (Andropogon gerardii) and switchgrass (Panicum virgatum) with shorter forbs like coneflower (Echinacea spp.) and black-eyed Susan (Rudbeckia hirta).

Planting Design and Spacing

In a polyculture system, plant native species in a diverse arrangement to mimic natural ecosystems. Aim for a density of 15-20 plants per square meter, with taller species towards the north or west to avoid shading smaller plants. For a grassland restoration, plant seeds in the following pattern: 2-3 grass seeds per square foot, and 1-2 forb seeds per square foot. Maintain a mix of open and dense areas to accommodate different species’ growth habits and provide habitat for wildlife.

Maintenance and Monitoring

Native plants in polyculture systems require minimal maintenance, but regular monitoring is essential to ensure the system’s health and biodiversity. Monitor for signs of invasive species, pests, and diseases, and adjust the composition of the polyculture as needed. Remove weeds and invasive species manually or through targeted herbicide applications, and maintain a regular watering schedule during the first year after planting. After the first year, the polyculture system should be able to withstand drought and other environmental stresses, minimizing the need for ongoing maintenance.