Forsythia × intermedia 'Spectabilis'
A classic tall border forsythia with vigorous, fountain‑like canes. Large yellow flowers open on bare stems in early to mid‑spring. Plants thrive in full sun and average, well‑drained soil. The size suits screens and informal hedges. Deep cold and late freezes can reduce bloom in zone 5.
At‑a‑glance
- Group/Class: Hybrid border forsythia (deciduous shrub)
- Height × spread: 8-13 ft × 5-8 ft (2.5-4.0 m × 1.5-2.5 m)
- Bloom window: March to April (early to mid‑spring)
- Color & flower form: Deep yellow; large single
- Fragrance: 0 none
- USDA hardiness: zones 5-8
- Breeder / Year / Origin: unknown; 1906; unknown
- Cut‑flower notes: forces easily; vase life about 5-7 days when kept cool
- Pet safety: safe (ASPCA: non‑toxic to cats and dogs)
How it differs
- Taller and more fountain‑shaped than modern compact forms.
- Large, brassy yellow flowers.
- Preferred where height for screening is needed.
Strengths
- Fast growth and dependable bloom in full sun.
- Long, arching stems create a dramatic display.
Care in one minute
- Full sun for strongest flowering.
- Average, well‑drained soil; tolerates clay after establishment.
- Water to establish; irrigate in extended droughts.
- Renewal‑prune right after bloom; avoid midsummer and fall pruning.
Watch‑outs
- Large size needs room and periodic renewal pruning.
- Flower buds can be lost below about −5 °F (−21 °C).
Best uses (tags)
screens; hedges; naturalizing; cutting
Provenance note
Marketed by Späth Nursery, Berlin, from about 1905 and planted at the Arnold Arboretum in 1908; an early standard of the hybrid group.
References
- Royal Horticultural Society. Forsythia × intermedia ‘Spectabilis’.
- Trees and Shrubs Online. Forsythia × intermedia – notes on ‘Spectabilis’.
- Missouri Botanical Garden Plant Finder. Forsythia × intermedia – culture and bud notes.
- ASPCA. Golden Bells (Forsythia) – Non‑toxic.
Written by: Your Flowers Guide editorial team
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