1, sowing. The species of grass flowers suitable for sowing in May are: Four Seasons Spring, Impatiens, Thousand Days Red, etc. Woody flowers include loquat, star anise, Mahonia latifolia, Solanum lyratum Thunb, bottle coconut and osmanthus fragrans. The seeds of the first five kinds of flowers can be picked and sown after washing, but the mature, black, soft and white osmanthus fruits should be stored in clean wet sand until February of the following year, and then sown when the seeds crack white. Pay attention to the following points when sowing seeds: first, the seedbed should be kept wet, but no water should be accumulated; The second is to cover grass to prevent seeds from "sprouting back"; Third, after the seeds emerge, it is necessary to pull out the grass for two or three times, and set up a shed to shade them in time to prevent the sun from damaging the seedlings. In addition, loquat is a big seed, but its young buds have a weak topping effect on the soil and are easy to bend. Too deep sowing will affect the emergence rate and seedling rate, so shallow sowing is appropriate, generally 2 to 3 cm deep until the ditch is full.

At this time, gladiolus bulbs planted underground can bloom in August; Tuberose planted underground can bloom from August to September.

Step 2 cut. The herbaceous ornamental plants suitable for cuttage in May include: Salvia splendens, Corydalis tricolor, Chrysanthemum, Commelina communis, Longkou Flower, Begonia Four Seasons, Begonia Bamboo, Tortoise Shell Bamboo (stem), cold spray, taro, candle, white nettle, amaranth, colorful grass, pepper, geranium, coral flower and so on. Succulent ornamental plants include epiphyllum, lotus, cactus (as rhizome), fenugreek (as rhizome), lycopodium, precious stones and so on. Woody ornamental plants include: Rhododendron, Eupatorium odoratum, Jasmine, Rosa roxburghii, Rose, Eupatorium odoratum, Nandina domestica, Tenjikukatsura, Mahonia, Rubber Tree, Dragon Blood Tree, Red Mulberry, Hydrangea, Pomegranate, Hibiscus, Mume, Phyllanthus urinaria and Magnolia grandiflora.

3. Grafting. In May, you can use wild roses as rootstocks to make roses sprout. Taking Magnolia grandiflora 1-2-year-old seedlings or cuttings as rootstocks, butting Magnolia grandiflora; Taking 2-3-year-old rubber trees as rootstocks, the branches are grafted with banyan trees; Taking green maple seedlings as rootstocks, the tender branches are grafted with red maple; Taking Chimonanthus praecox seedlings with thick fingers as rootstocks and connecting them with fine varieties of Chimonanthus praecox; Taking seedlings of osmanthus fragrans or Ligustrum lucidum as rootstocks and connecting with improved osmanthus fragrans; Grafting Camellia oleifera seedlings with shoots as rootstocks; Grafting Rhododendron occidentalis with Mao Dujuan as rootstock; Grafting chrysanthemum with Artemisia annua as rootstock; In early May, cactus and fenugreek were used as rootstocks to graft crab claw orchid; Grafting peony with triangular arrow as anvil.

4. Lamian Noodles. The species of flowers that can be propagated by plants in May are Hosta Hosta, Purple Calyx, Iris, Eupatorium odoratum, Allium fistulosum, Ophiopogon japonicus, Erjuan, Guangdong Evergreen, Bluegrass, Jasmine, Pearl Orchid, Jin Juhua, Lysimachia christinae, Begonia Siji, Nephropterium, etc.

5. layering. The flower species that can be propagated by layering in May are: Michelia, Eupatorium, Plum Blossom, Yingchun, Rose, Begonia, Cherry Blossom, Prynne, Rubber Tree, Belgian Rhododendron, Osmanthus fragrans, Magnolia grandiflora, Variable Leaf Tree, Podocarpus, Sabina vulgaris, Gardenia, Wisteria, Lingxiao, Milan and so on.