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When to Plant Ornamental Grass

Ornamental grasses can be planted at various times of the year. They are best planted, however, in the early part of spring when they can establish properly prior to the heat of summer. Since our plants are all container grown, they are more forgiving of summer and fall planting than bare-root plants. Planting times will, of course, vary by climate. Here are a few tips for various planting times.

Spring Planting
This time of year offers the best availability and selection of ornamental grasses from Santa Rosa Gardens. Most of the ornamental grasses are pushing new growth and will establish quickly.

Summer Planting
Container grown plants, such as those shipped by Santa Rosa Gardens, are fine to plant during summer months. The gardener must be aware, however, of potential drought and excess heat which will require supplemental watering for the ornamental grasses. Constant moisture may be required during excessively hot periods. Trim back the soft top third of foliage when planting in the hot summer months.

Fall Planting
Many grasses benefit from being planted in the fall. The early start will pay off in spring, as the roots have become established prior to the first big push of growth. Be cautious of early frost and aware of the temperatures in your local climate. We suggest planting 4 weeks prior to the risk of first frost. This allows the ornamental grasses enough time to establish before dormancy. Cool-season ornamental grasses will benefit most from fall plantings and enjoy the early start. Do not let plants dry out during late fall. Dry plants are more susceptible to cold weather damage. During late fall months as temperatures sometimes yo-yo, be ready to provide protection to young ornamental grasses. Straw, mulch, cloth covering, and plastic sheeting all can be used to give the grasses protection from cold.

Winter Planting
We do not recommend planting during freeze months. If you live, however, in an area that is tropical or safe from frost, year-round planting may be an option. There are, in fact, some ornamental grasses that are able to grow year-round without a period of dormancy. Often times, trimming back ornamental grasses periodically can give them a short period of sleep that mimicks dormancy. Gardeners in tropical climates will need to experiment with ornamental grasses to see which offer the greater longevity. Our experience with perennials in general is that they can be grown in areas of little cold, but may not have the longevity of perennials that receive complete dormancy and vernalization each winter.