Platycodon grandiflorum can be planted in spring and autumn every year, and the specific time is in April and September every year. At this time, the survival rate of Platycodon grandiflorum is high, the seedlings of Platycodon grandiflorum grow vigorously, the temperature is suitable, and it is not easy to be frostbitten, which can make Platycodon grandiflorum overwinter smoothly in the later stage.
seed treatment
When planting Platycodon grandiflorum, plump, healthy and pest-free seeds should be soaked in warm water at 50~60℃, stirred continuously during the period, and soaked for 65,438+02 hours after the water temperature is cooled to improve the germination rate of seeds.
Sowing method
When planting Euonymus japonicus, loose and fertile neutral sand mixed with humus should be selected as the cultivation substrate. The treated seeds can be evenly sown on the soil surface, and after being covered with a layer of 1cm, the ambient temperature is stable between 15~20℃, and the seedlings can emerge in 15~20 days.
Sowing and maintenance
Eustoma grandiflorum has a great demand for nutrients during its growing period. Before planting, decomposed farm manure, compound fertilizer or calcium superphosphate can be added to the soil to improve soil fertility. In order to accelerate the growth of balloon flowers, urea should be topdressing once every half month to accelerate the growth of flower buds. Pay attention to replenish water in time after each fertilization to avoid fertilizer damage.
Soil selection
The most important thing in sowing and planting is the choice of sowing medium. Because the seeds of Buxus macrophylla are very small, it is suggested to choose imported peat for sowing if possible. Otherwise, we can use ordinary peat, vermiculite and perlite to adjust the soil according to the ratio of 6: 3: 1.