Pelargonium grandiflorum (Geranium family) is less common than its close relative, Pelargonium zonale, although its large colorful flowers are no less attractive. This species is often called homemade pelargonium. Pelargonium large-flowered is a herbaceous plant 30 - 40 cm high with large, light green, jagged leaves at the edges. There are varieties of large-flowered pelargonium with simple and double flowers about 4 cm in diameter. Their colors are the most diverse: from white to maroon. Often the flowers are variegated, speckled, darker in the middle, light outside. Pelargonium large-flowered blooms with proper care almost all year round.
Throughout the year, the plant needs a lot of light, it is better to place it on the windowsill of the western or eastern window. In the summer, you can take the pelargonium pot outdoors. The temperature for pelargonium should be moderate; in winter, a cool content at 10 - 12 ° C is desirable. Pelargonium is undemanding to air humidity; from time to time the leaves should be sprayed to get rid of dust.
Pelargonium is watered abundantly, avoiding only stagnation of water at the roots. They are fed every two weeks with a liquid fertilizer for decorative flowering plants with a high potassium content. Pelargonium propagates by cuttings. It is best to do this in June. The upper parts of the shoots 10-12 cm long are cut into cuttings, the lower leaves are removed and the cuttings are placed in a container with light sandy soil. For rooting, put a container with cuttings in a bright place, but without direct sunlight, gently watered, sprayed in dry hot weather. As soon as young shoots appear, the plants are planted in pots and transferred to a permanent place. The substrate is prepared from sod and leafy soil, humus and sand in a ratio of 1: 1: 1: 1.
© Luigi FDV
In order for flowering to last as long as possible, the faded inflorescences are removed, and the shoots are pinched to avoid stretching them. Young plants bloom more abundantly, so it is recommended to propagate pelargonium every year. But if you want to preserve the old plant, then it must be removed from the pot in the fall and both roots and shoots should be cut off strongly. After that, plant pelargonium in a fresh substrate, then in the spring it will release no fewer peduncles than young plants.
Pelargonium is affected by whiteflies and aphids. To combat these insects, drugs such as aktara, actellik or fufanon are used. With excessive watering, high humidity, and poor lighting, pelargonium can develop gray rot. The infected plant must be treated with Bordeaux mixture or copper sulfate, and all damaged parts must be removed.