this very close godetia and some botanists combine these two plants into one genus. it named in honor of captain w. clark who brought europe from california century. nature can be found chile western part north america. has about species with only cultivated.
Clarkia is an herbaceous annual that can range in height from 0.3 to 0.9 meters. The surface of the erect branched shoots very often has pubescence consisting of short tufts. The sessile, alternately arranged leaf blades are oval-long in shape and light bluish or deep green in color.
The axillary flowers may be macrose or simple, regular in shape, up to 35 mm in diameter. And they can be colored in different shades of color. As a rule, they are part of apical inflorescences that have a tassel or spike-like shape, but sometimes there are single florets. The flower has a tubular calyx and the corolla consists of 4 trilobate or entire petals tapering into a marigold at the base. The fruit is an elongated polyseed.
Growing clarkia from seeds
There are two ways of growing this plant from seeds: as a seedless plant and via sprouts. If grown as a direct seedling, the seeds are sown directly into the open soil. Sowing is done in April or in the first days of May, it can also be done in the fall under the winter. When preparing the site for sowing, 1 kg of peat and 1 big spoon of superphosphate and potassium sulfate should be put under every 1 square meter under digging. The seeds are small enough and should be sown in clusters of 4 or 5.
The distance between the nests should be 20 to 40 centimeters. It is not necessary to bury seeds in the soil, but they should only be slightly pressed and covered with a thin layer of soil. The first seedlings may appear in half a month, and you will need to thin them, but you should take into account that during flowering, clarkia looks much more effective in a dense bush. If the sowing was done in the fall, sometimes the seedlings also have time to show up before the winter arrives, and they are well preserved under the snow cover. When the seedlings appear in the spring, they should definitely be thinned out like carrots.
Growing through seedlings
If clarkia is grown through seedlings, the young seedlings will be well protected from cold rains, frost, sudden changes in temperature and strong winds. It is recommended to sow the seeds in March, in which case the clarkia will start flowering in the first days of June. Seeds are sown in a slightly acidic substrate. It is not necessary to deepen them, and should only be pressed with a board and watered from a sprayer. Cover the container with glass and put it in a warm and bright place, but direct sunlight should not be there.
After the first seedlings appear, the cover should be removed. The container all the time should be in a warm dry place with good ventilation. Sprouting is done very early, as soon as the first true leaves appear.
Sprouting of annual flowers. Clarkia
Planting clarkia in the open ground
What time to plant
Transplant clarkia into the open ground in May.
In case the soil in the plot does not have the right pH for the plant, this can be corrected. To acidify the soil you can use one of three methods:
- to 1m 2 bring 1-1,5 kg of peat;
- to 1m 2 bring 60 grams of sulfur;
- fill the soil with a solution of a bucket of water and 1,5 big spoons of citric or oxalic acid.
If the soil is excessively acid, lime is added. If it is greasy, however, this can be remedied by the addition of sand under the digging. Also, be sure to fertilize the soil, and what fertilizers to use for this, see the section on growing clarkia without seedling method.
The site should be prepared at least half a month before planting.
How to plant
Propagate the seedlings not one at a time, but take the plants from the container in small groups together with a clump of soil. This group is then planted in one hole. Note that the distance between the holes can vary from 20 to 40 centimeters. Mature plants will need support, as they have very thin shoots, so do not forget to stick a long rod or stick near each hole.
Different varieties of clarkia should be planted far away from each other, as there is a high probability of their over-pollination. Once the bushes are planted they need to be watered and pruned a little so they will grow more bushy.
Growing the clarkia is relatively easy and can be done easily even by a beginner. Watering should only be done when there is a long dry, hot period. At the same time, watering should be done only a couple of times every 7 days.
At other times, these flowers enough and rainwater. When watering, please note that the liquid should quickly absorb into the soil, and not stand for a long time around the bush. Feeding should be done only during the formation of buds and flowering, and it is recommended to use a complex mineral fertilizer. Frequency of fertilization - once every six months. Of fertilizers recommended to use Raduga or Kemira, with organic fertilizer can not be added to the soil.
To make the flowering long and lush, it is necessary to remove the fading flowers in time.
Diseases and pests
From pests, the powdery mildew can settle on the clarkia. You can tell if the shrub is infested with this pest by the presence of a waxy, cotton-wool-like plaque that can be found on the above-ground part of the plant. To kill this insect, treatment with Confidor, Actara or Fytoverm is recommended.
If the soil where the clarkia is growing is loamy, it may promote fungal disease.
You can tell that the bush is infected by the rusty-yellowish spots with a brown border that are placed on the leaf plates. To get rid of the disease, you should treat the bush with a fungicide (oxychrome or Bordeaux liquid). If you plant this flower in a suitable soil and properly take care of it, it will have a very high resistance both to disease and pests.
This plant will self-sow even without your intervention. In the spring time you will only have to gently thin out the seedlings.
If you need seeds you can harvest them very easily. When the plants are in bloom, you will need to mark the most spectacular flowers. When they begin to fade, you will need to put gauze bags on them. The seeds will become mature 4 weeks after the flower has wilted, and the color of the capsule should turn brown. Cut off the capsules and drop the seeds onto newspaper.
These seeds can either be sown for the winter or put into a paper bag to be stored for the following spring.
When the clarkia is finished flowering, the bushes can be cut back to the ground if desired. And during the autumn re-cultivation of the plot you will need to remove the remains of the plants and burn them. Do not throw them away as these plant trimmings can harbor pathogens or fungi.
Clarkia species and varieties with pictures and names
Gardeners can only cultivate three types of clarkia, namely: marigold clarkia or elegant clarkia; pretty clarkia or pubescent clarkia; clarkia brevi.
Clarkia graceful, or marigold (Clarkia unguiculata, Clarkia elegans)
This species can be found in natural conditions in California. A branched, lush annual plant, it can reach 100 centimeters in height. Its thin, fairly vigorous shoots become woody underneath. There are red veins on the surface of the oval greenish-blue leaf plates, with an irregularly sparsely serrated edge. Flowers are regular in shape and four centimeters in diameter.
They can be either simple or pompous and come in a variety of colors: red, pink, white, purple and blue. They are placed one at a time in the leaf axils. The small seeds remain germinating for about 4 years. Blossoms lushly in July-September. This species is quite commonly grown in the middle latitudes.
Varieties most popular:
- Albatross. The majestic flowers are white in color. The branchy bush reaches about 0.75 m in height.
The majestic flowers are carmine in color and 35 to 40 mm in diameter. The bush reaches a height of 0.8 to 0.9 m.
- Salmon perfection.
The terry florets are colored salmon pink and have a diameter of about 35 mm. The loose bush is about 0.9 m tall.
This species is dwarf. The upright, branched shoots can reach 0.
4 m in height. The long, narrow, entire leaf plates are green in color. They are pointed toward the top and tapering toward the petiole. Flowers may be macro or simple. They can be arranged either singly or in small groups in the leaf axils at the top of the stems.
Of particular interest is the shape of the petals, which are divided into 3 lobes, spaced rather widely. In connection with this, in America, this species is also called "elk's horns". Flowering begins half a month earlier than the clarkia graceful.
Clarkia breweri (Clarkia breweri)
As of late, this species has become increasingly popular with gardeners. This cold-tolerant annual plant can reach up to half a meter in height.
The flower shape is similar to a butterfly and reaches about 30 mm in diameter. The flowers have a pleasant, strong scent and are part of the loose inflorescences. Pink Ribbons is pink with petals similar to ribbons and can reach a height of about 0.3m. The shoots of this variety are branched and bloom very lushly.
Other types of clarkia grown by gardeners are actually godetia.