After Tomb-Sweeping Day, although there was occasional cold air going south, it was unable to pose a threat to most potted flowers south of Huaihe River except that there were still ice and snow residues in the areas north of Huaihe River and Yellow River.
By the time we arrived in Grain Rain, the late frost in the south of Jianghuai had ended, the lowest temperature was not lower than 5℃, and the rainfall increased obviously. Most potted flowers can be moved outdoors for maintenance; In Huaibei area, potted flowers can't be released until the end of the late frost in May.
From south to north in April, bloom is as follows:
First, flower reproduction
1. Planting
Flowers suitable for sowing in April include butterfly, mirabilis jalapa, Celosia cristata, Illicium verum, sunflower, Dahlia, Primula, bunch of red flowers, impatiens, Petunia, Gynostemma pentaphyllum, safflower, Petunia, Chrysanthemum, Coreopsis, Hedyotis diffusa, Marigold and red Huang Ju.
The species of Magnoliaceae flowers and trees that can be sown and stored in sand in April are: Magnolia, Magnoliaceae, Magnolia, Magnolia, Manglietia, Manglietia, Manglietia rubra, Manglietia, Manglietia macrocarpa, Michelia, Michelia, Manglietia Lechang.
Other green flowers and trees that can be planted in April include: Abies japonica, Pinus densiflora, Aralia elata, Pinus bungeana, Lagerstroemia indica, Bauhinia, Albizia Albizia, Taxus cuspidata, Sapium sebiferum, Sapindus mukoraiensis, Liquidambar formosana, Acer negundo, Chimonanthus praecox, Prunus mume, Lycium barbarum and Prunus australis.
Ornamental plants that can be picked and sown in April are: hibiscus, asparagus, primrose, winter coral, octagonal gold plate, milk eggplant and so on. Among them, the octagonal gold plate can pick black, white and soft fruits at the end of April, rub out the seeds and sow them on the fertile seedbed, or hide the seeds in the sand until the cracks turn white, then sow them, cover them with grass and keep them moist. Generally, after two weeks, about 70% of the seeds emerge, weeding should be done in time and shed for shade; To cultivate milk eggplant, peel off the golden yellow fruit, wash off the seeds, soak them in warm water for 24 hours, sow them in fertile sand, and the seeds will germinate and come out after 10. When the seedlings grow 6-8 true leaves and the plants are as high as 15cm, they can be transplanted, potted and cultivated as special cut flowers.
graft
The species of flowers and trees that can be grafted in April are: Chimonanthus praecox, Sophora japonica, peach, longevity peach, locust, cactus and crab claw orchid.
3. Clonal ramets
In April, the greenhouse foliage plants that can be propagated by plants are: white crane taro, tiger's tail orchid, one leaf orchid, bracken, brown bamboo, chlorophytum, agave, Yindi evergreen, evergreen, Guangdong evergreen, arrowroot, aloe, pepper grass, turtle's back bamboo, spring feather and so on. The greenhouse flowers that can be propagated by ramets include Clivia, multicolored pineapple, crane orchid, hibiscus, purple calyx, cattleya, Hedysarum, Dendrobium, Cymbidium hybridum, Cymbidium hybridum, Begonia and so on. Bulbs and perennial flowers can be divided into dahlia, cauliflower taro, canna, lily, tennis flower, Zhu Dinghong, Hosta, iris, Belamcanda, tuberose, carnelian, HEMEROCALLIS HEMEROCALLIS and Eupatorium adenophorum. In addition, water lilies and bowl lilies can also be cut at this time.
Step 4: Cutting
For most species of flowers and trees that are easy to take root, as long as their leaves and buds have not germinated, they can be propagated by cutting in April. The main tree species are Boxwood, Mahonia, Bambusa australis, Cedar, Podocarpus, Pomegranate, Lagerstroemia, Bauhinia, Pyracantha fortunei, Spiraea, Liriodendron chinense, Snowflake Spray, Xiang Jie and Begonia.
Second, change pots and transplant
1. Potted flowers that cannot be changed in March can be changed in April as long as the branches are not too long, or when changing pots, there is no need to break the soil and shrink the roots. However, it should be pointed out that deciduous flowers and trees, if the shoots are too long, especially plum blossoms, must not be changed after the leaves are displayed.
April is the best time to transplant flowers and trees in the wild. Whether deciduous flowers and trees or evergreen flowers and trees, as long as their leaves and buds are not unfolded or their shoots are not long, they can be transplanted with soil balls in April; For evergreen flowers and trees, such as Cinnamomum camphora, Magnolia grandiflora, Michelia, Magnolia grandiflora, etc., some branches and leaves must be trimmed to reduce the transpiration of water from the crown; For deciduous flowers and trees, it is best to transplant them when their leaves are not exposed, such as magnolia, aesculus, linden, begonia, Chimonanthus praecox, red-leaf plum, ornamental peach, plum and apricot. Usually, the diameter of the soil ball of transplanted flowers and trees should not be less than 6 times the diameter of the trunk of the transplanted flowers and trees, so that the transplanted flowers and trees can have no worries without destroying the soil ball.
Third, bonsai modeling
April is one of the best time periods for bonsai modeling. The most suitable ornamental plants for beginners to practice modeling are those whose branches can withstand repeated winding and bundling by beginners and will not seriously affect their normal growth, such as Podocarpus, Cedar, Myrica rubra, Sabina vulgaris, Euonymus japonicus, Lagerstroemia indica, Sabina vulgaris, Ficus japonicus, Ulmus pumila, Yingchun, Xiang Jie, Ginkgo biloba, Pinus thunbergii and Sabina vulgaris. Other tree species suitable for modeling in April include wild hawthorn, pine needles, Pinus ponderosa, peach, pyracantha fortunei, Runnan, ash, triangle maple, oak, perfumed wood, golden marble, begonia, Fujian tea, papaya, Elaeagnus angustifolia, Ilex cornuta, Dictyophora dictyophora, and tiger thorn.
With the vigorous growth of bonsai plants, it is necessary to use metal wires or non-metal wires to constantly pull and correct them in time to keep them in a good ornamental state. This month, we should pay special attention to the following three aspects for the maintenance of five-needle pine bonsai: First, pick buds in time. When winter buds germinate and granular needles appear on them, 1/2 ~ 2/3 of the bud length can be picked to make the new buds shorter and denser; Secondly, both men's and women's jerseys should be erased. When needle buds and male and female cones can be distinguished from the new shoots, the female cones at the top and the male cones at the base of the new shoots should be erased in time to reduce the consumption of nutrients during reproductive growth. The third is to control watering. Starting from the new tip, it is necessary to strictly control watering, so as not to do it, and spray instead of watering to ensure that the new needle is short and the branches remain flat and good.
Fourth, fertilization management.
1. Fertilization
Potted Camellia, Camellia, Chimonanthus praecox, Rhododendron, Yingchun, Admiralty, Daphne odora, Kumquat, Zanzan, Winter Coral, Crab Claw Orchid, Cymbidium hybridum, Cymbidium hybridum and so on. Because they consume a lot of nutrients when they bloom or bear fruit, it is necessary to apply nitrogen-based fertilizer when they resume growth after spring. Topdressing should also be applied to flowering potted flower varieties such as rose, bauhinia, pomegranate, cymbidium, hibiscus and cymbidium. The variety can be potassium dihydrogen phosphate, and the concentration can be controlled at about 0.2%. Magnolia grandiflora, Magnolia purpurea, Michelia, Plum Blossom, Chimonanthus praecox and Begonia planted on the ground should also be topdressing in time. Meet the needs of its vegetative growth after flowering.
2. Plastic surgery and maintenance
Rich trees can braid their hair in April. Dig out the seedlings of Nostoc flagelliforme planted or purchased, sow/kloc-0 in the shade for 0 to 2 days, let them lose water, then braid with odd-numbered trunks of 3, 5 and 7, press them with heavy objects after braiding, and select suitable potted plants after fixing their shapes; The vitality of the rich tree is extremely strong. Even if it is too late to braid or plant and sow for 3 to 5 days, it will not affect its future survival and normal growth.
3. Adjust the shape of plants to prevent diseases
For potted flowers moved out of the room, dead branches, yellow leaves and withered leaves should be eliminated in time, plant types should be adjusted, and water and fertilizer management should be strengthened; For flower seeds prone to diseases, sulfur mixture or Bordeaux mixture should be sprayed in time to prevent possible diseases.
4. Fruit-watching potted management
Used for potted plants to watch flowers and trees that bloom in April, such as papaya, ginkgo, pyracantha, peach leaf coral, begonia and so on. Especially dioecious or cross-pollinated, during flowering, we should pay attention to creating favorable conditions for their pollination and fertilization, so that they can fertilize and bear fruit normally, and don't miss the opportunity.
5. Cutting seedbed management
For ornamental plants that have just been cut, special attention should be paid to the management of water spraying before the formation of healing tissue. Unless there is an intermittent spraying device, water (fog) must be sprayed 2 ~ 3 times a day to keep the cutting substrate moist all the time and create the best environment for their healing and rooting.