When does evening primrose blossom?

Nocturnal incense is a kind of flowers and plants that many families like to breed. The branches are slender, they bloom in summer and autumn, and the yellowish green flowers bloom in the evening. They are very suitable for home planting, but they can not be kept indoors for a long time. It will cause dizziness, cough and even asthma and insomnia. Let's take a look at when it will bloom.

When does evening primrose blossom?

Generally speaking, the flowering period of nocturnal incense is from May to October, and the reason why the span is so large is due to the influence of variety, air temperature, humidity, soil and climate in the north and south. In the north, the blooming season is in late June, while in the south, it is mostly from August to September. This is because the summer heat in the south leads to high air humidity, which is suitable for nocturnal incense to bloom.

Why does evening primrose open at night?

1. Nocturnal incense is pollinated by ugly moths, instead of bees and other small things like other flowers, but moths only appear at night, so in order to attract nocturnal moths to pollinate, they choose to have a strong aroma at night, which is the plant's ability to adapt to the environment.

2. Nocturnal incense and stomata are diametrically opposed to many flowers. For other flowers, the air humidity approaches some, and the air humidity expands when the air humidity is small, while nocturnal incense is the opposite. If the air is humid and the stomata are wide open, the aromatic substances in it can expand more quickly, thus making it fragrant to the nostrils. At night, due to the absence of the evaporation of the sun, the ground temperature drops suddenly, the cold air drops, and the humidity increases abruptly. It is certainly easier for nocturnal incense to open and open more intensely in such a humid environment.

Why doesn't evening primrose blossom?

1. The flower buds of nocturnal incense were formed on the bulbs in the first year, and may be planted with small tubers, which did not reach flowering age, so they could not blossom. Generally speaking, the diameter of the bulb should reach more than 2.2 cm, and the inflorescence primitive body has been formed in the first year, and it can bloom only after planting.

2. The bulb was dug too late or the tuber was stored improperly in winter, the temperature was too low, and the flower buds in the stem were damaged or rotted, and the flower buds could not blossom in the coming year.

3. The time of digging bulbs was too early, which affected the differentiation of flower buds in tubers, so that they could not blossom in the second year.

4. Excessive application of nitrogen fertilizer leads to long stems and leaves, less flowering, and even no flowering in serious cases.