EVERGREEN

Plant Encyclopedia

Rudbeckia

Rudbeckia (genus)

Japanese name: ルドベキア
Scientific name: Rudbeckia

Rudbeckia

[Overview]
Mostly perennials, though some are annuals.
The leaves include basal leaves and stem leaves.
The stem leaves are alternate, simple or pinnately divided.
Flower heads are borne facing upward at the stem tips.
The ray flowers are yellow or brown at the base.
The tubular flowers are green, brown, reddish purple, and so on.
The fruit is an achene.

[Cultivation]
Propagate from seed or by division.
It prefers a sunny, well-drained, fertile soil.
If the environment suits it, it grows well even when left alone.
For potted plants, water thoroughly when the soil surface dries; for plants in the ground, rainfall is sufficient.
For potted plants, apply slow-release fertilizer from spring to autumn; for plants in the ground, no fertilizer is particularly needed if base fertilizer is applied.
There are no particular pests or diseases.

Details

Names
Japanese: ルドベキア
Life form
Annual, Perennial
Habit
Terrestrial
Planting (or sowing) season
April, May
Flowering season
June, July, August, September, October
Distribution or origin
North America
Leaf shape
Simple leaf (unlobed), Lobed leaf
Leaf arrangement
Basal, Alternate
Inflorescence
Head
Flower color
Orange, Yellow, Brown, Multicolor
Leaf color
Green
Availability of seeds and plants
Low
Form sold
Seeds, Seedlings
Propagation
Seed, Division
Sun exposure
Full sun
Water needs
Moderate
Soil needs
Required
Tolerance
Heat tolerance
Suitable uses
Potted plant, Flower bed, Cut flowers, Parks and gardens, Container

Translated from our Japanese encyclopedia. If anything differs, the Japanese page is correct.

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