How to propagate a spirea
Spirea is a very popular ornamental plant. Due to its rich color and vibrant shades, it is chosen by amateurs and professional gardeners. The article describes the breeding, reproduction, terms and conditions of planting spirea in stages.
How to propagate spirea
Spirea can breed in four species:
- by seeds;
Seed propagation is suitable for all types of plants, but not for hybrids. Hybrids are bred only by cuttings or using layering.
Propagating spiraea with seeds is much longer and more painstaking, but it is professionals who often resort to this method. It is also popular with scientists who in this way derive new decorative species of this bush.
Seed selection and collection
Seeds for sowing are collected in the fall, when the boxes become more brown. It is necessary to cut the fruits with seeds and place in the container for ripening. Covering the tank is not required. After 2 weeks, collect the seeds and leave until sowing in October-November or April.
Did you know? Japanese Spirea has about 100 species and can adapt to any climate.
Sow the seeds in a box. In order to place the seeds evenly, you can use a sheet of white paper. If sown in the spring, then the soil needs to be watered and covered with a film. Place the container with crops in a hole in the bed and sprinkle with earth.
It is necessary to place the container in a darkened place or where there is not very much sunlight, so that the soil does not dry out. When sprouts appear, it is required to remove the film.
When spirea sprouts grow about 2 cm tall, they need to dive. It is necessary to remove the spirea seedlings from the container in heaps of several pieces. Sort as necessary according to shade.
Important! Crops need constant watering.
Trim the third part of the elongated roots of each seedling and plant them in a container with earth observing a distance of 5-6 cm. Place the container with crops in a darkened place. Somewhere in August, it is advisable to transplant plants to the garden, and next season - to permanent places.
Transfer to a permanent place
For spirea, you need to choose a place in the territory where it is always sunny. So flowers on the bush will grow a larger number. The soil must be selected loose and wet. In bad soil, turf or leafy soil is added in advance, and peat and sand are required.
Did you know? Title spirea comes from the Greek word «σπειρα» denoting «spiral».
You can cut any kind of spirea, this is probably why this method is so popular. And also the plant grown from the handle will grow a copy of the original donor.
How and when to prepare cuttings
Rooting cuttings of spirea is recommended in September - October. This is because the cuttings are covered with snow in winter, which will give them the necessary moisture, and take root in the spring. It is required to select and divide into cuttings branches that are more than a year old: they are even and grow up. Each cuttings should have 4-5 leaves.
It is required to remove the lower leaves. The rest is cut in half. Submerge the cuttings in the Epina solution (1 ml per 2 liters of water) for 12 hours. Powder the lower part of the stem with a powder stimulator of the root formation.
Site selection and preparation
You need to choose a warm, darkened place. Fluff up the soil and add peat or sand as needed.
It is necessary to immerse the cuttings in the wet sand by 2 cm. Cuttings need to be planted at an angle of about 50 °. This is due to the fact that, when placed upward, revitalization of the upper kidneys is activated, and when it is tilted, the growth of the roots is activated. Cuttings should be periodically sprayed with water.
During heat more than 3 times a week.Then cover the container with the cuttings with a film or an ordinary glass jar. Place the cuttings in a shady place, it is best under the trees. In the period of frosts, dig the container with cuttings in the garden. Cover the cuttings with leaves and cover with a wooden box.
Propagation by layering is the easiest way from the above. It does not require special skills and additional materials.
How and when to make layering
At the very beginning, you need to choose a mature bush. It is recommended to make layering at the spring pruning stage. Layers are made up of basal branches that are more than 4 years old. For better rooting, add herbal infusion or rotted cow manure to the soil.
After fertilizing the soil, you must:
- dig a hole in the soil with a depth of 10-15 cm;
- pour a faint hot pink solution of potassium permanganate;
- lay a root branch and fill the hole with earth.
More preferably, more than four vegetative buds are present on the branch. Actually, the first roots are formed from the kidneys.
Video: How to propagate spirea layering
Layers require frequent watering and top dressing, so in the summer, every 7 days, growth stimulants are added to the soil, and in the spring - potassium containing fertilizers.
After two months, the layering will take root and break through the soil, and after a year - a real seedling is formed. With the onset of spring, you need to separate the seedling from the donor plant and plant it in a tank so that the spirea develops its own root system. Next, the seedling is transplanted to where it will grow constantly.
By dividing the bush, spirea is propagated, usually at the age of 3-4 years. Separating older bushes is quite difficult, because the overgrown roots are covered with copious amounts of land.
In the absence of time for constant watering of the planting, it is more efficient to propagate spiraea by dividing in early autumn. The soil at this time of year is warmed up, and the roots sprout rapidly, and the air is already colder and wetter - the plants do not consume a large amount of water during evaporation.
How to cut properly
It is required to dig up a bush, covering about 60% of the land under the bush. The roots must be washed. It is enough to put them in a container of water for three hours. The earth will soften and wash off easily. If the roots are not tightly twisted, then you need to separate them.
Important! When the shoots are planted in the ground, they will branch quickly and this will increase the chances of engraftment.
Cut the bush with garden shears into 2-3 more or less equal shares. On all lobes there should be at least 2-3 strong sprouts and a voluminous bunch of roots. Root processes should be approximately the same length. Elongated need to be trimmed.
Dig a hole to plant the separated part and form a hill out of the ground at the bottom of the hole. Lay the seedling on a hill and spread the roots. Fill the hole and pour it generously with water. During the heat season, it is required to moisten the spirea at least once every two days, during rains and clouds - once every 7 days.
Spirea, separated in late August - early September, take root better. Despite the hot days during this period, fog forms in the evening. And the increased humidity in warm soil improves the rooting of plants.
In order for the bush to have a neat appearance, it needs circumcision and decoration of the crown. Shorten weak branches and those that are more than 7 years old. It is better to cut the crown in the spring, until a cover of leaves has formed. Pruning in summer can provoke secondary flowering in the fall.
When fertilizing is needed, you can dilute the manure with water and water the soil around the roots. Or use a superphosphate solution. It will take 8-10 g of fertilizer per 10 liters of water. Spirea does not require constant watering. Only during drying, additional moisture is needed. During the winter cold, it is recommended to sprinkle the roots with leaves.
Spirea is prone to fungal diseases: ascochitosis, ramulariosis, septoria.One of the symptoms is the appearance of spots on the leaves. If they are present, it is advisable to spray the plant with a Bordeaux mixture, Fundazol or colloidal sulfur.
You can not carry out prevention during flowering, it can destroy all the flowers. They are also susceptible to attacks by spider mites and aphids. To overcome ticks, spraying with phosphamide or karbofos will help. Pirimore is used to kill aphids.
Which method you would not choose - the result will not keep you waiting. This is not a home decorative flower, which stands on the windowsill and pleases only you. Blooming spirea will enrich any garden and place. When each branch is covered with flowering, the riot of colors is simply amazing.