Peony Karl Rosenfield

There is no need to worry; ants are not pests. They appear on peony buds because the plant secretes a sweet nectar that the ants enjoy. They do not damage the buds in any way, and as soon as the flowers open, the ants usually disappear. There is no need to use chemicals against them.

It may be Botrytis (gray mold), which attacks peonies in humid weather or if they are planted too densely.

• Solution: Immediately remove and dispose of the affected parts (do not put them in the compost).
• Prevention: Ensure good air circulation around the plant, do not over-fertilize with nitrogen, and water at the base, not on the leaves.

Peonies appreciate nutrients to support the production of large blooms.

• Spring: Use an organic fertilizer with a higher potassium and phosphorus content. Avoid excess nitrogen, which can increase susceptibility to fungal diseases.
• Autumn: You can spread a thin layer of well-matured compost around the plant.

After flowering, it is advisable to remove the faded flowers so the plant does not exhaust itself by producing seeds. Cut the stem below the flower, but leave the leaves – the plant needs them for photosynthesis and to store energy in the roots for the following year. Cut the entire plant (leaves) down to the ground only late in the autumn.

Yes, the Karl Rosenfield peony has large, full, and heavy blooms. Although its stems are relatively sturdy, they can bend under the weight of water-soaked blossoms during rain or wind. We therefore recommend placing a circular support around the plant in early spring so that the leaves and stems can grow through it naturally.

Peonies are long-lived perennials that do not like being transplanted. They can stay in one spot for decades. If transplanting is necessary, do so exclusively in the autumn (September/October). It is advisable to divide the older clump into smaller sections (each should have 3–5 eyes) to rejuvenate the plant.

Watering is most important during the first spring after planting, when the root system is not yet fully developed. Keep the soil slightly moist, but not waterlogged. Older, well-established plants are relatively drought-tolerant and generally only need watering during periods of severe drought in the spring before flowering. In the summer after flowering, they usually manage on their own.

Yes, planting depth is absolutely crucial for peonies. A common mistake is planting them too deeply, which causes peonies not to bloom.

• Plant them so that the buds (eyes) on the roots are no more than 2–3 cm below the soil surface.
• After covering with soil and watering, the tips of the buds should just barely protrude or be just under the surface.
• Remember that the soil will settle slightly after watering.

Peonies are plants for patient gardeners. If your peony is not flowering, there may be several reasons: 1. It is too young: They bloom only exceptionally in the first year after planting and reach their full beauty only after 3 years. 2. It is planted too deep: If the eyes are more than 3 cm below ground, the plant will grow but will not bloom. 3. Lack of sun: Peonies need at least 6 hours of direct sunlight daily. 4. Over-fertilization with nitrogen: This promotes leaf growth at the expense of flowers.

Yes, peonies are classified as mildly toxic plants. Both the roots and the above-ground parts contain substances that can cause nausea (vomiting, diarrhea) if consumed in large quantities. We recommend caution if you have small pets or children in the garden who like to taste plants.

The Karl Rosenfield peony is a fully hardy perennial (zone 4a, down to -34 °C).

• Mature plants: Can handle winter without protection.
• Newly planted plants: For the first winter, we recommend covering the planting site with evergreen boughs or mulch to prevent frost from heaving the roots to the surface.

No, the Karl Rosenfield variety is one of the peonies that does not have a scent (it is not fragrant). Its main assets are its deep, crimson red color and reliable, abundant blooming, rather than its fragrance.

Definitely! This variety is excellent for cutting. Cut the flowers at the “soft bud” stage (when the color is showing and the bud feels soft like a marshmallow to the touch). They will stay fresh in a vase for a long time and make a beautiful display.

Peonies thrive best in deep, nutrient-rich, and well-draining loamy soil. It is important that the soil is not permanently waterlogged (clay-heavy), as this causes the roots to rot. Prepare a planting hole that is sufficiently large (twice as wide and deep as the root ball) and you can improve the bottom with compost.

Choose a sunny spot with plenty of space (plan for an area of about 1 m²). Peonies can tolerate partial shade, but for abundant flowering, they require at least 6 hours of sunlight. Avoid locations in close proximity to large shrubs or trees, as peonies do not like root competition.