Obedient plant (Physostegia virginiana) profile

Written by Maggie

Mar 08 2021

Obedient plant (Physostegia virginiana) profile

Obedient plant, scientific name Physostegia virginiana, also called false dragonhead, is a biform order, labiform family perennial herbs, with stolons. Obedient plant height of the is 60 ~ 120 cm and the stem is square. Obedient plant is suitable for large pot or cut flowers, cultivation and management is simple, appropriate arrangement of flower border, flower bed background or wild garden planting.

Obedient plant picture

Obedient plant

Morphological characteristics of obedient plant


The spikes of the Obedient plant are assembled into panicles. The florets are dense.If the floret is pushed to one side, it will not reset, hence the name. The floret rose purple.

Farming period: Summer to autumn flowering, light blue, purple and pink florets in July to September spikes terminal.Inflorescences spiked, labiate, spreading from the bottom to the top, persistent.

Design and color

The colors of the Obedient plant are white, deep peach, rose red, snow green, light red, purple or variegated leaves, and other colored varieties.Leaves are oblong opposite. 

The ecological habits of obedient plant

The Obedient plant likes loose, fertile, well-drained sandy loam, and poor growth in the dry summer. Natural nature is strong, underground stolon is easy to grow seedlings, after cultivating 1 plant, often propagating numerous young plants by themselves.

The Obedient plant is fond of warm, sunny and loose, fertile, well-drained sandy loam. It is cold-resistant, resistant to light frost, resistant to fertilizer and has strong adaptability. Obedient plant is more developed underground creeping rhizome, and after flowering the plants are senile and the aboveground parts are withered, while the underground rhizome will sprout many new buds to form new plants.

The Obedient plant is light-loving, cold-resistant, heat-resistant and half-shade resistant. Propagation can be sown, cut or split in spring. Obedient plant is easy to grow, and needs water in drought.

How to grow and are for obedient plant

Soil quality

The requirement of cultivation soil is not high, but the fertile sandy loam with good drainage is the best for growth.


Cultivation place sunlight should be good, shaded place plants easy to grow barren, poor flowering.


Cut flower cultivation plant spacing of 30 cm, pre-mixed decomposed compost as base fertilizer when preparing the ground, after transplanting to survive, the heart is picked once, to promote more branching. Top dressing was applied once a month with N, P and K. Phosphorus, potassium fertilizer proportion is a little more, can promote flowering.


Spring to summer for the fertile period, cultivation should maintain sufficient humidity, do not let the drought affect the growth and flowering. The old Obedient plant should be pruned once in winter or early spring, and should be renewed and cultivated over 3 years old.


Obedient plant is appropriate to use a large pot, 2 ~ 3 plants per 8 inches. The soil in the pot is more favorable for root extension. After 1 ~ 2 years, it should be forced to separate plants and change pots. Tall plants, easy to cause lodging, cut flower cultivation when necessary to set up a pillar or use nylon net fixed branches. Obedient plant likes warm to high temperatures, and the suitable temperature for growth is 18 ~ 28℃.

Obedient plant

Propagation of Obedient plant

Propagation methods of the obedient plant are: seeding, dividing and cuttage reproduction. In production practice, seeding reproduction is the main method.

Seed propagation

A. Making seedling bed In the northern alpine regions, usually in spring, make a seedbed 5 ~ 6 m long, 1.2 m wide and 25 ~ 30 cm high in a greenhouse or greenhouse. The bed surface is turned loose, broken and leveled. Let it be exposed to the sun for a few days, and then use potassium permanganate solution to disinfect the seedling soil.

B. Sowing and seedling management will be Obedient plant flower seeds sown on the bed, again on the bed and the right amount of carbofuran (the drug can kill the worm, earthworms and other pests, no phytotoxicity of seeds), sand about seed diameter 2 times, keep seedbed moist at ordinary times, under the condition of 16 ~ 21 ℃ 6 ~ 7 d can emergence, 3 ~ 4 true leaf can miao, when transplanting.

Division propagation

General points of 1 every 2 years, the annual breeding coefficient is 1:3 ~ 5) commonly, fertile soil of 1: (5 ~ 8), points strains can green period, in the early spring in 4 ~ 5 month will rise 2 ~ 3 years Obedient plant, 8 ~ 10 strains, each must be complete with 1 ~ 2 buds, then press the row spacing of 0.2 m, planting distance of 0.2 m, 0.2 m deep pit, basal first into the pit, a fine soil, then planted seedlings, plant covering after 4 ~ 5 cm, compaction and then pouring water.

Disease control of obedient plant

The spray method

The method most commonly used, if necessary, spraying out of aphid pine oil 2500 times liquid, 50% or 20% speed kill ding (kill chrysanthemum ester) was 2000 times liquid, or 2.5% of deltamethrin was 2000 ~ 3000 times liquid, or 2.5% of kung fu oil (pyrethrins) 3000 ~ 4000 times liquid, or 50% pirimicarb (monarch aphid fog, pekah, die set, Rapiol) wettable powder 2000 ~ 3000 times liquid, or sulfur grams of budweiser 1000 times liquid, 20% or 40%, chrysanthemum malathion cream, 2000 ~ 3000 times liquid, and chrysanthemum 40% ec 4000 times liquid, Or mite spirit killed 1500 ~ 2000 times liquid, power, or 2.4%, 1500 ~ 2000 times liquid, micro emulsions was killed or 21% culling 6000 times liquid, and 5% cis cypermethrin (quick killing, efficient green treasure, blockbuster, seibel cypermethrin, cypermethrin, and destroy a body ning) was 1500 times liquid, or a 10% net aphid lice wettable powder 4000 ~ 5000 times liquid, or 15% dalai mite spirit was 2500 ~ 3500 times liquid, etc.

Powder spraying method

Obedient plant is suitable for aphid prevention in the protected area, in the evening sealed shed, every 667 square meters with aphid dust agent 1 kg, with hand duster spray.

Yellow plate induced aphid

The winged aphid has a strong tendency to yellow and orange yellow, which can be used to trap aphids. The method is to take a rectangular piece of cardboard or fiberboard, the size of the board is generally 30cm×50cm, first coated with a layer of yellow advertising color, dry, and then coated with a layer of viscous oil or No. 10 oil.Insert the board into the field, or hang it between vegetable rows, about 0.5 meters higher than the vegetables, use oil to stick aphids, often check and apply oil.

Obedient plant varieties

Physostegia virginiana: "Pink Bouquet": Profuse bloomer with soft pink flowers. Good choice for northern gardeners. Typically grows between 2 and 3 feet tall.

Physostegia virginiana "Summer Glow": A tall grower with deep lavender-pink flowers. Reaches heights of 3 to 4 feet tall.

Physostegia virginiana "Variegata": White edges on leaves make this variety interesting all season. Produces pink flowers and grows up to 24 inches tall.

Physostegia virginiana "Vivid": Forms short, dense clumps. Produces bright purple-pink flowers and grows up to 2 feet tall.

Distribution area of obedient plant

Obedient plants are distributed in North America.

Obedient plant main use

Medicinal value

Obedient plant seeds contain fat oil, can reduce blood sugar, increase glycogen content in liver and muscle, have diarrhea affect. Obedient plants taste sweet, flat. It has the effect of hair generation and swelling reduction. Obedient plant can treat of hair loss, chilblain, constipation. Black sesame seeds nourish the liver and kidney and moisturize the five viscera.

The purpose of the garden Obedient plant

The graceful leaves and bright flowers of the Obedient plant are suitable for large potted or cut flowers. It is easy to cultivate and manage, and it is advisable to arrange flower borders, flower bed backgrounds or planting in wild gardens.

The leaf shape is neat and the flowers are gorgeous, which is very suitable for potted ornamental or planting in flower beds and flower borders. Because its color is light purple, belongs to the cool color, and the warm color of a string of red, red comb and other collocation of planting, its beautiful color can show the unique charm of herbaceous flowers.

The type of the Obedient plant is neat and the flowering period is concentrated. It can be used for autumn flower beds, or for flower borders or cut flowers. Obedient plant is widely used in garden and green space. Obedient plant can be used for flower beds, grass patches of planting; Potted plants are also available.
Obedient plant