Detailed Guide to Planting Evergreen Grass Seeds
SummaryFine land preparation: level the land, then apply an appropriate amount of chemical fertilizer and decomposed organic fertilizer. Establish a drainage and irrigation system: grass has a relatively high water requirement, so a good drainage and irrigation system can be established. Seed selection: seeds of different varieties can be selected for mixed sowing; in areas with a high incidence of underground pests, seed can be dressed with methyl tolclofos or 0.2% dimethomorph. Sowing: sowing is generally carried out in autumn, and the seeds must not be sown too deep; irrigate promptly after sowing, and during the growth period, sprinkler irrigation can be carried out using a 30 m sprinkler head.
1. Fine land preparation
Before planting, the land is required to be relatively level, with a height difference of within 3-5 cm per mu; both heavy clay soil and soil with a relatively high sand content need to be improved, to make it easier to cut and roll the turf after the grass forms a lawn later. While preparing the land, an appropriate amount of chemical fertilizer and decomposed organic fertilizer can be applied; generally, 5 g of diammonium and 5 g of potassium chloride can be applied per sq m.
2. Establish a drainage and irrigation system
Grass has a relatively high water requirement, especially during the period from after sowing to emergence. The top 2-3 cm of soil must neither dry out due to water consumption nor allow waterlogging to appear in the field, so a good drainage and irrigation system needs to be established.
3. Select varieties
Generally, when establishing a lawn, seeds of different varieties need to be selected for mixed sowing; it is not advisable to sow a single variety. The variety mixing ratios are 2/3 Kentucky bluegrass plus 1/3 tall fescue, 2/3 Kentucky bluegrass plus 1/3 ryegrass, or mixed sowing of different varieties of Kentucky bluegrass.
4. Seed treatment
Before sowing, seed dressing or seed coating is required. In areas where underground pests occur more frequently, seed needs to be dressed with 0.2% dimethomorph or methyl tolclofos, and during this process the seed dressing must be carried out strictly according to the instructions.
5. Sowing time
In the Beijing area, the sowing time is from April 10 to 25, or from August 20 to September 20. It is generally suitable to sow in autumn, which helps suppress weed growth through normal lawn emergence and prevents weeds from competing for the grass's nutrients.
6. Sowing depth
When sowing a single variety, the sowing rate is 10-12 g/sq m for Kentucky bluegrass and 30-40 g/sq m for ryegrass. For mixed sowing, calculate using these rates, then mix the seeds evenly and scatter them onto relatively hard topsoil, avoiding sowing too deep. Then use a soil mixer to mix the soil to a depth of about 0.5 cm, and finally use a roller to gently compact it.
7. Reasonable irrigation
After sowing is completed, irrigate promptly. Never flood-irrigate the lawn; sprinkler irrigation can be carried out during this period, and a 30 m sprinkler head can be used. If a 50 m sprinkler head is used, topsoil covering is needed, otherwise the seeds will be washed away by water, resulting in uneven emergence. When watering, the soil needs to be thoroughly soaked, then wait about 15 days for emergence. The emergence standard is full stand when there is one plant per sq cm.