The plant is short and smaller than a few sunflowers. Whether in the courtyard or by the door, in the summer, not only are there beautiful flowers to see, but there are sunflower seeds to eat, which are not contaminated, which only growers can experience。
And the best planting period for sunflowers is now
Sunflowers are usually 1 to 3. 5 meters tall. It's straight, round-sided, hard-cut by white rough hair. Large ovarian blades are usually cross-born, sharp or lean, with a base of 3 arteries, rough-cut edges, two rough, hairy and bearing. Headline, 10-30 cm in diameter, single-born on the top of a tuber or branch。
Seeding of sunflowers: march-april
Appropriate temperature for seeding: 18-25°c
Episode: 5-7 days
The method of seeding is on-demand, with approximately 25 px covered, and flowers blooming for about 50 to 80 days, depending on the variety. The seeding can take place at 125 px soil temperature of 5°c。
The basic principles for selection during the broadcast period are:
First, the proper early or late transmission, based on the regular occurrence of saline, to avoid saline harms on seedlings
(b) second, spring or summer broadcasts based on the birth of the variety
(c) thirdly, to adjust the frequency of the outbreak to avoid the frequency of the disease
Fourth, the planting period is adjusted to the growth characteristics so as to avoid high temperature weather above 28°c。
In addition, it should be noted that the top soil capacity of sunflowers is not particularly strong and that, in order to ensure that the number of seedlings is produced, the actual volume should increase by 10-20 per cent over the calculated volume。
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