It is important to check with your local extension office before adding the plant or its relatives to your landscape to see if allowable in your area. Dig out plants with main stems less than three inches tall or use a Weed Wrench or similar tool to pull them out of the ground. Broom will regrow and further action will be needed to control it. Note: Although broom plants produce attractive, sweet-pea like blooms, they have become highly invasive in many areas. Cut mature broom plants with primary stems three inches or larger, as low on the plant as you can, near the soil surface. The broom family is a hardy, no fuss group that is much maligned but can perform well in the cultivated garden with little care. Use organic mulch to prevent weed competitors and conserve moisture. These pests overwinter in old debris, so keep the area under the plant raked clean. Trim the plant in late fall, late winter or before flower buds have formed if you want to keep the size down without diminishing blooms. Other trimming is up to you but not strictly necessary. Just a light deadheading will do the job. Once the flowers are spent and seed heads have formed, pruning broom shrubs is recommended to reduce seed spread. Try growing sweet broom shrubs in groups as a hedge or border with brilliant yellow flowers and stems of wild abandon. Broom shrubs don’t need supplemental food in most situations but add iron sulfate in spring where soils are alkaline. Water your sweet broom regularly for the first few months if rainfall isn’t sufficient to keep the soil moist. Push the soil around the roots and tamp it down. Dig a hole twice as deep and wide as the root ball. These plants tolerate a range of unpleasant conditions such as windy sites, low fertility and even rocky areas. Select a bed where the soil has been worked deeply and is freely draining. This low maintenance plant may be just the thing for an easy care garden. Pruning broom shrubs is optional but can help to keep it in the habit you wish. If established in well-drained soil, the plant’s needs are met with low fertility additions and moisture. The plant forms a shrub 6 to 8 feet (1.5-2+ m.) wide with a slightly smaller spread. ![]() With careful management, sweet broom can be a wonderful addition to the landscape. ![]() Across many of the nation’s highways it blazes with color and attracts pollinators of many species. If the plant can become invasive, why then would you want to know how to plant broom shrubs? Besides sweet broom’s nitrogen fixing abilities and its rapid growth with fibrous soil stabilizing roots, the sweet smelling, attractive blooms are a harbinger of summer. But is sweet broom invasive? It was used by the United States transportation department to colonize disturbed roadsides after building trans-continental roads and to enhance soil properties but is now considered invasive in some regions. The plant was popular for its rapid growth and low sweet broom shrub care. This is evident in its bloom form, and also means the plant has the capacity to fix nitrogen in soil. A common bit of sweet broom info is its relation to the pea family or Fabaceae.
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