How to propagate Penstemon by hand? These key points you need to master

Penstemon has bright, gorgeous flowers and a long blooming period, making it a flower variety that many gardening enthusiasts love very much. Planted together with other blue perennial flowers, it can create a scene of vivid colors. Penstemon can also be grown in pots for ornamental viewing. Artificial propagation of Penstemon can be done by sowing, cuttings and division.

Penstemon

1. Propagation by sowing

This is mostly done in autumn, and the seeds can be sown right after harvesting. The seedlings are delicate, so you need to keep the growing medium moist, sprinkling water or soaking the pot frequently. Propagation by sowing is prone to variation, so many fine varieties generally do not use this method.

2. Propagation by cuttings

Fine varieties can be propagated by cuttings in autumn, and cuttings can be taken in October. Choose strong, tender shoot tips after flowering, cut them into cuttings about 10cm long, disinfect the cut area with carbendazim or captan, then insert them into a sterilized sand cutting bed or a shallow pot. Keep up the humidity and provide appropriate shade, and they will root in about 30 days. Rooted plants can be potted and planted out. If growing them in the ground for a flower bed, they can be removed from the pot and planted in the ground in March to April of the following year after the ground thaws.

3. Propagation by division

This is mostly chosen in spring. Within the few days when the mother plant has just shown new buds, dig up the mother plant's root ball or remove it from the pot, determine the new divisions based on the sprouts, cut the new plants away from the mother with a knife, and plant them directly. After planting, water thoroughly, and they will quickly expand their root system and grow into sizable plants. Cultivation management: It likes a sunny, humid, well-ventilated environment, dislikes hot, dry conditions, is not cold-tolerant, and is not strict about soil, but the soil must drain well, with calcareous sandy loam being best. Whether in pots or in the ground, general cultivation management is relatively simple. During the growing period, pay attention to watering, and keeping it constantly moist is good for growth. In hot, rainy summer areas, pay attention to drainage; especially in the rainy season, prevent death from excessive rainwater and overly high soil moisture. During the growing period, pay attention to timely fertilizing before and after flowering so the flowers are large and brightly colored. After flowering, the plants should be protected from the cold to overwinter. In northern regions, for potted plants, cut off the upper withered branches in late September to early October, remove them from the pots and place them in a sun-facing cold frame to overwinter; for ground-planted plants, prune the aboveground parts in late autumn and water with antifreeze water to protect them through winter.

Key cultivation points for Penstemon

Penstemon is a perennial evergreen herbaceous plant with a blooming period from April to May, very suitable for planting in flower beds and flower borders in landscaping. Penstemon barbatus is native to the area from Utah in the United States to Mexico, and is a medicinal herb recognized by local residents in Mexico.

Penstemon

Penstemon likes a sunny, humid, well-ventilated environment, is not cold-tolerant, dislikes hot, dry conditions and acidic soil, and must have good drainage, with calcareous, fertile sandy loam. It is slightly tolerant of partial shade and requires well-drained soil.

Penstemon has brightly colored flowers and a long blooming period, suitable for planting in flower borders; combined with other blue perennial flowers, it can create a very vivid color landscape. It can also be grown in pots for ornamental viewing. There are about 250 species in the same genus, and commonly cultivated ones include Penstemon barbatus; Penstemon hirsutus, etc.

Introduction to the growing methods for Penstemon

Penstemon

Penstemon (Penstemon campanulatus), also known as ivory red, is native to Mexico. Its flowers are bright, its flower colors are many, its flower stems reach up to 45cm, and the whole plant is hairy. The flower shape is very similar to a trumpet, and no matter how it is cultivated it can show its ornamental value. It is the first choice for flower plants in garden scenic areas and the best choice for gardening enthusiasts to beautify their home environment. Below let us learn about the growing methods for Penstemon.

I. Main value of Penstemon

Penstemon has brightly colored flowers, a long blooming period and an elegant plant shape. It is an excellent courtyard flower and can be used in flower beds or flower borders. It is suitable for planting in flower borders; combined with other blue perennial flowers, it can create a very vivid color landscape. It can also be grown in pots for ornamental viewing.

II. Growth habits of Penstemon

It likes a sunny, humid, well-ventilated environment, is not cold-tolerant, dislikes hot, dry conditions and acidic soil, and must have good drainage, with calcareous, fertile sandy loam. It is slightly tolerant of partial shade and requires well-drained soil.

Penstemon

III. Growing methods for Penstemon

1. Soil

Penstemon cannot adapt to acidic soil but can grow healthily in neutral or slightly alkaline soil. Soil with excellent drainage, good air permeability and calcareous, fertile sandy texture is best.

2. Light and humidity

Penstemon likes light and grows most healthily in an environment with ample light, humid air and good ventilation. However, Penstemon is not heat-tolerant, so in summer do not provide appropriate shade, to prevent direct sunlight from damaging Penstemon's flowers and leaves.

3. Watering

The soil for growing Penstemon must have good drainage. If potted, choose a flowerpot with holes in the bottom, and place some crushed stones under the pot to prevent the soil from becoming too wet, which would cause Penstemon's roots to rot.

4. Fertilizing

Pay attention to timely fertilizing before and after Penstemon flowers, which can make the flowers large and brightly colored. After flowering, cold protection measures should be taken to help it overwinter smoothly.

5. Pruning

For potted Penstemon in northern regions, pruning is generally done from late September to early October, mainly cutting off the upper withered branches, then removing it from the pot and placing it in a sun-facing cold frame to overwinter; if ground-planted, it is usually pruned in late autumn, also trimming its upper part. Outside the leaf-shedding period, if leaves turn yellow and become smaller, they need to be cut off promptly.

IV. Disease control

Axillary buds and adventitious buds grow in large clusters, internodes become shorter, leaves yellow and become smaller, clear veins appear, and in winter the small branches do not fall off and form a bird's nest shape. Severely affected plants die in the same year, and mildly affected ones also die after a few years. The disease is severe each year in July to August.

Control methods

In spring, girdling the diseased branches can prevent the pathogen from moving to and spreading to other parts, achieving a control effect.

At the early stage of the disease, spray a 4000-fold solution of tetracycline antibiotics.

The name Penstemon may not sound very familiar, but perhaps we have seen it in some park or by the roadside, just without knowing its name. I hope gardening enthusiasts who have once passed it by can get to know it again through the introduction in this article. It is not only a garden flower plant, but also an ideal plant for people to beautify their environment.+