Propagation methods and matters needing attention of Canna

Schematic diagram of canna seeds about to fall off

The red and green canna does not require a high growth environment at all, but it is more common in the subtropics because it is not hardy. Its flowers are larger, the florescence is also relatively long, some scenic spots will cultivate it for tourists to watch, the breeze is full of fragrance, it is a good variety of flowers in spring and summer. Let's learn about the breeding methods and matters needing attention of canna.

I. growth habits of canna

Like warm and humid climate, not resistant to frost, suitable temperature 25-30 ℃, like sufficient sunshine fertile land, no dormancy in the origin, annual growth and flowering; strong sex, strong adaptability, almost no choice of soil, moist and fertile loose sandy loam is better, slightly resistant to water and moisture. Afraid of the strong wind. After frost from April to May in spring, flower buds were formed at the top of the stem after germination, and the florets opened from bottom to top. In the growing season, the buds of Reagan stems germinated one after another to form new stems and blossomed continuously from June to Frosts Descent, and the total flowering period was long. The rhizome can survive the winter in the open field in the south of the Yangtze River, and the north of the Yangtze River must be protected artificially.

Not resistant to cold, afraid of strong wind and frost. It is not strict with the soil, can withstand barren, and grows well in fertile, moist and well-drained soil. After the plant withered in late autumn, cut off the aboveground part, dig out the rhizome, air for 2-3 days, bury it in the well-ventilated sand in the greenhouse, do not water it, and keep it for more than 5 ℃ to survive the winter safely.

2.Propagation methods of canna

1. Sowing method

Before sowing, the hard seed coat was filed with a file, then soaked in 25 ℃ water for 24 hours, and then sowed in the plain sand of the seedbed or flowerpot. Do not cover the soil too thick, should be 1 to 2 times the diameter of the seed. After that, it is necessary to keep the room temperature of about 20 ℃, and pay attention to keep the soil moist. Generally, it can sprout after 1 week, and when the seedling height is 5 cm, it can be planted and planted. Sowing seedlings can blossom in that year.

two。 Split root and stem method

At the beginning of March, the rhizome of canna stored in the previous year was cut into pieces, so that each piece must have two or three bud holes, remove the rotten part, then bury it in a plain sand bed in a low temperature greenhouse or plant it directly in a flowerpot, promote germination under the condition of 10 ℃ to 15 ℃, and pay attention to keep the soil moist. About 20 days, when the bud grows to 4 to 5 cm, it can be divided into pots or planted. In practice, we found that after planting canna, it entered the initial flowering stage from June to July, when the temperature was higher, the canna could also be propagated, and the durable effect was also very good. We call it the split method. The difference between this method and the rhizome method is that one is after the time is wrong, and the other is whether to reproduce or not, which is only determined by the distance between the adults observed visually on the surface.

3. Split-plant method

Choose a rainy day or evening from June to July, with a sharp shovel, the distance between plants or clumps is more than 4 to 5 centimeters, those without inflorescence are cut vertically down from the plants, and then quickly split or clump, strive to bring more soil, do not hurt branches and leaves, directly planted into the planting hole, it is best to dig while planting, timely watering after planting. In case of dry weather, but also appropriate shade and spray more water to the branches and leaves to increase humidity. In this way, after about 10 days of maintenance, the new plant can grow and blossom like the mother plant, with almost no difference. After ramet, the potholes at the root of the mother plant must be filled with soil.

Canna

III. Matters needing attention in the propagation of canna

1. The healthy rhizome was selected as the propagation material, and the suspected bacteria-carrying rhizome was soaked with 500-1000 times of streptomycin before planting.

two。 Should be planted in sunny, fertile, moist, well-drained areas to avoid planting too dense.

3. Dwarf varieties should be selected for potted canna.

Editor's note: before sowing, disinfect the seeds of canna, and also disinfect the soil, which can be exposed to the sun, boiled in boiling water or soaked in formalin. In order to raise a healthy canna, the seeds and soil of masochism must be eliminated.

Culture methods and matters needing attention of canna

Culture methods of canna

Light

Canna growth is suitable for all-day sunshine, the environment is too dark, lack of light, the flowering period will be delayed. If you put it in a cool place during flowering, you can prolong the flowering period.

Temperature

The suitable growth temperature of canna is 15 ℃-30 ℃. During flowering, placing canna in a place with low temperature and no light can prolong the flowering period, and the ambient temperature should not be lower than 10 ℃.

When the temperature is above 40 ℃, the canna can be moved to a cool and ventilated place. Before and after Frosts Descent, the potted canna can be moved to a temperature of 5-10 ℃ to survive the winter safely.

Watering

During the growing period, canna needs to spray water on its leaves 1-2 times a day to maintain humidity.

Because canna is very fond of fertilizer and moisture resistance, so the basin should be watered thoroughly, and the watering times should be grasped according to the actual situation.

Fertilizer application

Apply sufficient basal fertilizer before planting, in addition, topdressing 3mi 4 times a month during the peak growth period.

Soil

Canna does not have high requirements for soil, but it grows best in loose, fertile and well-drained sandy soil, even in fertile clayey soil.

Matters needing attention in Canna Culture

Ensure the light

Canna requires plenty of light during its growing period, ensuring that it receives at least five hours of direct sunlight every day.

Pay attention to controlling the amount of fertilizer application

Potted canna sometimes shows scorched and yellowed leaves, mainly due to excessive application of ferrous sulfate.

If the fertilizer is too thick in the heat of summer, it will burn the roots of canna, causing it to "burn to death".

Stop fertilizing during the flowering and winter periods of canna.

Never get too cold when watering in summer.

In a hot summer, if the water is too cold, it will also cause scorching at the edge of the leaves.

Timely pruning after falling behind

When the flower at the end of the stem lags behind, the stem branch should be cut off from the base at any time in order to sprout new buds and grow flower branches to blossom one after another.

Culture methods and matters needing attention of mandarin duck canna

Latin name Canna warscewiezii A.Dietr

The plant kingdom.

Phylum angiosperm

Dicotyledonous class

Jiangmu

Cannaceae

Belong to the genus Canna

Mandarin duck canna is weak in growth, slow in growth and slow in reproduction. It is best to avoid continuous cropping because it is planted every other year. The main diseases and insect pests of mandarin duck canna are grasshopper, snail, blow scale, whitefly, rust, soot and so on.

1. Morphological characteristics.

Mandarin duck canna is a perennial semi-evergreen tufted herb. The plant is 60-120 cm tall, the pseudostem is thin, green or purplish red, and the underground rhizome is fleshy. Leaves alternate, broadly elliptic-lanceolate, 20 cm long and 14 cm wide, leathery, with changes in leaf color, purple and green leaves can be seen on the same plant, and all-green leaves, entire leaves. Raceme, terminal, with 2-3 branches, flowers color or red and yellow, or all red, or all yellow, petals with yellow, orange, red and other spots or stripes. The florescence is from May to November.

2. Growth habits

Its nature likes the climatic conditions of high temperature, high humidity and sufficient light. A neutral to slightly acidic soil with a deep, fertile, humus-rich soil that is not resistant to drought, barren, shade and cold. The suitable temperature for growth is 23-30 ℃.

3. Propagation and cultivation

The cultivation of mandarin duck canna should choose the plants that have not yet flowered. Digging holes and applying enough organic fertilizer, summer is the peak season for its growth. It is necessary to strengthen water and fertilizer management and soil cultivation, prune withered branches and yellow leaves in time, maintain good ventilation and prevent the occurrence of rust. Mandarin duck canna is weak in growth, slow in growth and slow in reproduction. It is best to avoid continuous cropping because it is planted every other year. The main diseases and insect pests of mandarin duck canna are grasshopper, snail, blow scale, whitefly, rust, soot and so on.