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Goldenrod – Oligoneuron Rigidum
Goldenrod produces a large cluster of small yellow flowers. The goldenrod grows up to 8 feet in one year. It requires a moist or somewhat dry soil.
Golden Rod Plants — Solidago
Goldenrod plants have gotten a bad reputation for causing fall allergies, but this is untrue. The pollen of the goldenrod is simply too heavy to be blown around by the wind and into people's noses. The blame for that goes to ragweed, which flowers around the same time.
The unique plant is as tough as it is graceful and does well in hardiness zones 3 to 9. It flowers in late summer and fall and grows from 1 to 6 feet tall. The flowers are tiny, but they appear in dense clusters of bright yellow to rich gold at the tips of the stems. Butterflies and bees adore them. The leaves are narrow and toothed. Not only does the goldenrod brighten up a herbaceous garden when other flowers might be fading, but it dries beautifully. It is excellent in floral arrangements. Smaller specimens make a good ground cover.
The plant does best in well-drained loam that's just slightly acidic, but it is not overly fussy about soil as long as it's not soggy. Goldenrod does well in full sun to light shade and needs medium watering.
Another attribute of it is that it is a fairly powerful healing herb. When dried, it makes an effective tea and tincture to treat inflammation and upper respiratory problems, including flu and colds. Gargling with golden rod eases symptoms of laryngitis and sore throat. Other people have been known to make wine out of this plant as well.
Once established, goldenrod doesn't need too much pampering. It does not suffer from major diseases or pests.
Plant the seedlings about 18 to 24 inches apart. Tall varieties may need to be staked unless the gardener likes the way the stems gracefully bow beneath the weight of the flowers. It is best to let goldenrod naturalize, especially in meadow gardens, but hybrids should be propagated by division.