How to extend the flowering period of Calendula officinalis

How to extend the flowering period of Calendula:

1. After normal flowering in early spring, the residual stalks are cut off in time to promote re-emergence of new branches, strengthen water and fertilizer management, and bloom again from September to October.

2. In the autumn broadcast basin in early August, after the frost is reduced, it will be moved to the temperature of 8 °C ~ 10 °C, and the outdoor leeward will be placed in the sunny place during the daytime. Watering once a week for about 1 week, keeping the soil moist, and pouring the compound liquid fertilizer once a month, so that it can continue to bloom during the winter season.

Third, at the end of March or early April, live in the courtyard. After the seedlings are released, appropriate seedlings or transplants will be given. Reasonable fertilizer and water conditions will be given, and flowers will bloom in early June. Because the golden chrysanthemums need a long low temperature stage, the spring sowing plants are weaker than the autumn sowing, and the flowers are small.

Fourth, in late August, the open field is broadcast in autumn, and the seedling period controls the watering at the right time to cultivate strong seedlings. After winter, transplanted to winter and winter. When the temperature drops below 0 °C, cover the grass curtains at night to prevent cold, and remove the straw curtain during the day. When the minimum temperature drops below -7 °C, a plastic film is applied under the curtain. At this time, only the straw curtains are uncovered during the day, and the film is not uncovered, but it should be properly ventilated around noon on sunny days. When the minimum temperature in the early spring of the next year rises above -7 °C, remove the film in time and cover the straw at night. When the minimum temperature rises to 0 °C, the straw curtain should be removed immediately. At this time, water is properly watered to keep the soil moist, and at the same time, the thin pancake water is applied once every 15 days, so that the golden daisy can be opened at the "May 1st" festival.

In addition, the seeds of Calendula officinalis are firstly placed in a refrigerator at 0 °C for a few days for low-temperature treatment, and then planted in the open field in early August, and can also bloom in late September.

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