Clasping coneflower (Rudbeckia amplexicaulis)
Clasping coneflower (Rudbeckia amplexicaulis) is a plant in the annuals and biennials category that can grow 50cm – 1.5m tall and 10cm – 50cm wide. In this growing guide we’ll learn the cultivation details and how to plant Clasping coneflower (Rudbeckia amplexicaulis).
This plant is commonly known as clasping coneflower.
This is a deciduous plant that takes 1-2 years to reach full maturity.
In this article
Common name: clasping coneflower
Scientific name: Rudbeckia amplexicaulis
Plant type: Annual / Biennial
Height: 50cm – 1.5m
Spread: 10cm – 50cm
Sunlight: Full Sun, Partial shade
Soil: Chalk, Clay, Loam
Moisture: Moist but well drained
Garden type: City & Courtyard Gardens, Coastal, Informal Garden, Wildflower meadow, Wildlife Gardens
Planting type: Cut Flowers, Flower borders and bedding
Other characteristics: RHS Award of Garden Merit
Annuals and biennials are ideal for formal or informal flower beds, but also for growing in pots and containers of all kinds. They are important plants for their rapid growth, instant color and relatively low cost.
They are also useful plants for filling spaces between newly planted trees and shrubs, as well as in perennial beds that may need to be revived after the first spring bloom.
They are an important ingredient in country house gardens and wildflower meadows.
How to plant
In this section we will learn how to plant Clasping coneflower (Rudbeckia amplexicaulis), know its needs in terms of soil, watering and sun exposure.
Clasping coneflower (Rudbeckia amplexicaulis) is not a demanding plant regarding the type of soil and can grow in chalk, clay or loam.
The chalky soil is pale and contains chunks of calcium-rich rock. It is a fertile and well-draining soil, almost always alkaline.
Clay soil is composed of more than 25 percent clay particles. These particles have a high moisture holding capacity and the soil is heavy to dig and can be waterlogged in winter (dry in summer).
The loam soil is dark, rich in organic matter but balanced in minerals. It offers the best of all worlds, retaining enough water for the plants, but allowing excess moisture to drain away. This is the most desired type of garden soil, perfect for most plants.
It is not very sensitive to soil acidity or alkalinity and grows well in soils with pH acid, alkaline or neutral.
Regarding drainage, Rudbeckia amplexicaulis likes to grow in moist but well drained soil.
Clasping coneflower (Rudbeckia amplexicaulis) is a plant that should be grown in full sun or partial shade positions.