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Goldenrod is a native North American perennial wildflower that is tall and slim with fluffy golden flower spikes in various shades of yellow. Once regarded as an invasive weed, goldenrod is increasingly valued by gardeners thanks to cultivars that offer better performance and more attractive flowers. Goldenrod grows best in any sunny location, survives well in average or even poor soil, and thrives in temperatures between 65 and 80 degrees Fahrenheit.
Goldenrod Care
Here are the main care requirements for growing goldenrod.
Plant goldenrod in the spring or fall, choosing a sunny location with average soil.
Stake the taller varieties so the plants don’t flop and bend.
Water young goldenrod plants weekly to keep soil moist until established, then only supplement in drought.
Do not overfertilize; goldenrod does not need fertilizer at all.
Light
Goldenrod craves full sun for optimal flowering. The plant will tolerate a bit of shade, though a shady location can reduce its blooms.
Soil
Goldenrod is not overly picky about soil but it must be well-drained with a pH in the acidic-to-neutral range. This plant can tolerate sandy, rocky, and clay soils. Very rich soil can cause the plant to become leggy and potentially flop over.
Water
Water new goldenrod plants weekly to maintain damp, but not soggy soil. Mature goldenrod plants are drought tolerant and rarely need supplemental watering except when rainfall is scarce.
Temperature and Humidity
The hardiness range varies a bit depending on the species, but most goldenrods thrive in USDA cold hardiness zones 2 to 8, taking heat and cold weather in stride. Goldenrod isn’t fussy about humidity, either.
Types of Goldenrod
The many goldenrod species vary somewhat in size and appearance. Cultivars are known to be less aggressive spreaders than the species forms. Some popular species—all native to North America—include:
Solidago caesia (blue-stemmed goldenrod) has arching purplish stems. It is not an aggressive spreader and produces good cut flowers.

Solidago odora (sweet goldenrod) is a 2- to 4-foot plant with anise-scented leaves and yellow flowerheads. It does not spread aggressively and has a good tolerance for poor, dry soils.
Solidago rugosa, also known as rough goldenrod is a 3- to 5-foot plant with a fondness for moist conditions. A popular cultivar is ‘Fireworks’, with its arching golden-yellow flowerheads that resemble an exploding skyrocket.
Solidago speciosa, also known as showy goldenrod, grows 1 to 3 feet tall, with dense clusters of tiny yellow flowers.

Solidago sphecelata,also known as autumn goldenrod, is a 12- to 24-inch species with arching stems holding plumes of yellow flowers. Two notable cultivars are ‘Golden Fleece’, a short 15- to 18-inch plant with arching cylindrical flowers, and ‘Wichita Mountains’, a 30-inch plant with rich gold flowers.
Solidago bicolor (white goldenrod)is noteworthy simply because it does not display the typical yellow goldenrod blooms. Instead, it features white blooms.

SOURCE: THESPRUCE.COM




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