What is the reason why soybean sprouts have long roots and thin stems, and the watercress is purple?

You're talking about Douban Green.

Prefers warm, moist semi-shady environments. The growth temperature is about 25, the minimum should not be less than 10, it is not resistant to high temperature, requires high air humidity, and avoids direct sunlight; Prefers loose, fertile, and well-drained moist soils.

Cultivation method: Substrate preparation: Loose, draining and good aeration of 5-40mm imported peat, crush the peat and mix well with water, (water standard: after adding water and mixing well, hold a handful of peat in your hand, and water seeps out from your fingers) to be planted in a cup.

The amount of peat in each 9cm pot is about 200 ml, and a pack of 300 liters of imported peat can hold about 1500 cups. [5]

Upper pot: For the reused old pot, it must be soaked in potassium permanganate 1000 times for more than half an hour, and then rinsed with water, dried and set aside, and the new pot can be used directly. Generally, use a smaller pot (9cm plastic pot) to plant, plant a proper substrate at the bottom of the cup, and then move the sieve seedlings into the cup, the seedlings can be planted appropriately deeper, and the base of the flat plant is slightly up, 1 pot; The substrate is moderately tight, filled until the cup is 9 minutes full, gently vibrate the potting soil, and pour the root water semi-permeable or surface water.

Why don't you ask an agricultural expert?

Cut off the diseased leaves in time'Buy medicine and spray it.

A few drops of vinegar when watering plants may have some effect.

This is: watercress green.

Also called: jasper, green leaf jasper, pepper grass, jade pepper grass, watercress Ruyi, four-petal golden hairpin, nail grass, watercress can't be killed, pepper grass.

It is a perennial evergreen herb of the family Piperaceae. Native to the West Indies, Panama, and northern South America, and later introduced to China, it is generally used as a bonsai decoration, and is widely popular for its bright luster and natural green color.

The plant can also be used medicinally, according to traditional Chinese medicine, its internal use can dispel wind and dampness, cough and expectoration. Topical use can treat bruises and fractures, so it is also an important part of Chinese herbal medicine.

The green leaves of watercress turn yellow and soft for the following reasons:

Watercress green likes moisture but is not waterlogged, too much watering can easily lead to root suffocation, the leaves will become soft and fall off, and the roots will rot. Therefore, watering should master the principle of seeing dry and wet.

The fleshy nature of watercress green stems and leaves contains more water and is more drought tolerant. However, if the potting soil is too dry and the air is very dry, it will cause the green leaves of the watercress to turn yellow and soft. Water when the surface of the potting soil is about 3 cm dry.

The potting soil is not loose enough, and after a period of time, it will be compacted, and the root system will not be able to breathe well, and it is easy to cause yellow leaves and leaves to be soft.

Watercress green is not resistant to strong light, suitable for indoor or scattered light maintenance, if the light is too strong, it will cause the leaves to turn yellow and soft.

The green leaves of watercress are green and fat, and they are originally raised so simply.

It means that it is rotting, is it that you are pouring too much water? Mine was the same before, or was the temperature too high or too low?

Improper watering causes cell death and bacterial infection. Pay attention to the amount of water.

There are bacteria, if it does not affect the appearance, it can be cut off! It can be properly ventilated with light.