How to sow Coreopsis macrophylla

Preparation before sowing

Seed harvesting

Coreopsis large-flowered is suitable for sowing and propagation, and seed collection and preservation are very important. Between August and October each year, select the inflorescences with most of the fruits mature, cut them off, dry them in the sun to remove impurities, select the seeds, place them in a dry and cool place, and pack them in moisture-proof paper bags. Store the seeds in a dry, dark, and well-ventilated place at an ambient temperature of 10-15°C. A good germination rate can be maintained after 1-2 years.

Planting season

The sowing of large-flowered coreopsis can be done in spring or autumn, and the suitable temperature for germination is 15-20 degrees Celsius. People in the Northeast should note that autumn comes early and spring goes late, so spring can be postponed and autumn can be advanced.

Seeding process

Matrix preparation

The seedbed should not be too wide to facilitate operation. The substrate should be loose and breathable sandy loam.

Sowing Seeds

The seeds of Coreopsis large-flowered are small in size, so they can be sown by broadcasting. Mix the seeds with sand and spread them evenly on the prepared seedbed. The seedbed should be about 15 cm higher than the surrounding ground to facilitate drainage.

Covering

After sowing the seeds, cover them with a thin layer and water them thoroughly.

Watering

Watering should be even, and under fertile conditions it is best to use a water hose connected to a sprinkler or a spray bottle. After watering, cover it with straw mats. In the future, you should regularly observe the humidity of the seedbed to keep it moist, and not let it be too dry or too wet.

Seedling care

The seeds will germinate 14 to 21 days after sowing, and the straw curtain can be opened after the seedlings emerge. After the seedlings grow true leaves, apply nitrogen fertilizer once.