Canna Lily Care Guide: A Plant That Can Monitor Sulfur Dioxide
Canna lilies originate from tropical and subtropical America, and are also known as red canna, orchid canna, tiger-head canna, and broken-blood red, among other names. They have high ornamental value and can also monitor sulfur dioxide. Let us now learn about the canna lily care guide together.

1. Monitoring Function
Canna lilies can remove and monitor the harm caused by harmful gases such as sulfur dioxide and chlorine, and give a warning. When their leaves are found to lose their green color and turn white, and the flowers and fruits drop, you should be especially wary of chlorine pollution.
2. Care Guide
(1) Light
During the growing period, they require sufficient light, and must receive at least 5h of direct sunlight every day. If the environment is too dark and the light is insufficient, the flowering period will be delayed.
(2) Temperature
Canna lilies prefer higher temperatures, and the suitable growing temperature is 15-28°C. If the temperature is below 10°C, it is unfavorable for their growth.
(3) Watering
Canna lilies can tolerate short periods of waterlogging, but they are afraid of too much water; if there is too much water, it can easily cause rhizome rot. When canna lilies have just been planted, water them frequently, once a day, but the amount of water should not be too much. During drought, spray water on the branches and leaves more often to increase humidity.
(4) Fertilizing
Before planting, sufficient base fertilizer should be applied into the soil, and during the growing period the plant should be given additional fertilizer frequently. After the plant grows 3-4 leaves, apply liquid fertilizer once every 10 days until flowering.
(5) Propagation
Canna lilies can be propagated by sowing or by division.
(6) Pruning
After flowering, remove the flowers that have not yet fully fallen as early as possible, to reduce nutrient consumption and encourage the plant to continue producing new flower branches. In various places in the north, after the Frost's Descent solar term, if canna lilies suffer frost damage, all the aboveground parts will turn yellow and wither; at this time, cut off the withered aboveground parts, dig out the rhizomes, dry them slightly, then store them indoors buried in sandy soil, and replant them the following spring.
(7) Placement and Display
Canna lilies can be planted directly in the courtyard for appreciation, or planted in wooden barrels or large flower pots and placed in the living room, on the balcony, on the rooftop, in the corridor, and other places.
The above is the canna lily care guide compiled by the Huinong website editors. Have you all learned it?
Care Guide for the Corn Poppy, Which Has the Effect of "Monitoring Sulfur Dioxide"
The corn poppy is also known as rival peony, pleasure beauty, beautiful spring flower, brocade quilt flower, and butterflies filling the garden in spring, among other names. It is a flower variety with very high ornamental value, and has been a favorite flower of people from ancient times to the present. So how do you care for the corn poppy? Now let us learn the corn poppy care guide together with the Huinong website editors.
1. Brief Introduction to the Corn Poppy
Before the flower opens, the flower bud is egg-shaped, wrapped outside by two sepals, and the sepals are green with white edges; the flower stalk is slender and upright, slightly drooping, the petals number 4, and the flower color is unusual. Du Fu wrote a poem in praise: "Among a hundred grasses competing in spring splendor, the beautiful spring flower should be the finest."
2. Monitoring Function
The corn poppy mainly detects hydrogen sulfide. Once the air contains hydrogen sulfide gas, the leaves of the corn poppy will scorch and develop spots, and even the flower buds will show a reaction.
3. Care Guide
(1) Light
The corn poppy likes sunlight and needs sufficient light, so when indoors, be sure to ensure good light; however, in the early stage after transplanting, it should be shaded, and after it survives, gradually expose it to sunlight, then gradually extend the light duration.
(2) Temperature
The corn poppy fears intense summer heat, but has a certain cold resistance and likes a warm environment; the temperature should be controlled at 15-28°C. In winter it enters dormancy, and at this time it can tolerate slightly low temperatures.
(3) Watering
For potted corn poppies, water once every 3-5 days. Normally, do not water too much. During the growing period, that is, around the Beginning of Spring solar term, the frequency of watering can be appropriately increased to maintain soil moisture, and waterlogging must be strictly avoided. Winter is the dormant period, so as long as the soil is not allowed to become excessively dry, that is enough, and watering must not be frequent.
(4) Fertilizing
The corn poppy is suited to fertile soil. During the growing period, apply fertilizer once every 2-3 weeks, using decomposed urine diluted with 5 times water, and apply one more supplementary fertilizer before flowering.
(5) Propagation
Generally speaking, the corn poppy is suitable for propagation by sowing, and can be sown in both spring and autumn.
(6) Pinching
When the corn poppy seedlings grow 6-7 leaves, pinching should be carried out; this is to make the seedlings branch. If seeds are not being kept, promptly cut off the spent flowers that have not fully fallen during the flowering period, to ensure the plant's nutrients, which can make the later flowers more vivid and also extend the flower
(7) Placement and Display
The corn poppy has vivid flowers and a graceful posture. Potted corn poppies grown at home are suitable for placement in the living room, on the balcony, on the windowsill, and other well-lit and ventilated places, and can also be made into vase arrangements and placed in the living room, study, or dining room.
The above is the corn poppy care guide compiled by the Huinong website editors. Have you all learned it? Corn poppies are relatively simple to grow, but caring for them is not so easy. So friends who want to grow corn poppies well must patiently learn the above care techniques.
Care Guide for the Azalea, Which Has the Function of "Monitoring Ammonia Gas"
Azaleas are also called yingshanhong, mountain azalea, and so on. They are one of China's top ten famous flowers, with extremely high ornamental value. They also have the function of monitoring toxic gases. Now let us learn the azalea care guide together with the Huinong website editors.
1. Monitoring Function
Azaleas have strong resistance to harmful gases such as ozone and sulfur dioxide, and can also absorb these harmful toxic gases, playing a role in purifying the air. They are also very sensitive to ammonia gas and can serve as a monitoring plant for it.
2. Care Guide
(1) Light
Azaleas are long-day flowers. Even in midsummer, they should not be placed in too shady a place, but rather in a ventilated spot and a relatively cool place, that is, a shaded spot outdoors. At the end of September and the beginning of October, when sunlight intensity weakens and the weather becomes cool, the shading time should be gradually shortened, and it is best to place them on a balcony facing southeast in front of the house.
(2) Temperature
In mid-to-late April, move them out of the greenhouse, first placing them in a wind-sheltered, sunny spot; in summer, provide shade, or place them under trees in dappled shade, avoiding direct strong sunlight. The suitable growing temperature is 15-25°C, and the maximum temperature is 32°C. In mid-October, begin moving them indoors. In winter, place them in a sunny spot and keep the room temperature at 5-10°C. The minimum temperature must not be lower than 5°C, otherwise growth stops.
(3) Watering
In summer, water more and water frequently, because summer temperatures are high, sunlight is intense, and water evaporates quickly. In the morning, water thoroughly; in the evening, water as the situation requires, and spray water on the leaves to keep the leaf surface clean and the environment humid.
(4) Fertilizing
At the end of each winter and the beginning of spring, it is best to apply some organic fertilizer to azaleas as base fertilizer. After azaleas flower in April-May, since the plant consumes a large amount of nutrients during the flowering period, as the leaf buds sprout and new shoots elongate, a supplementary fertilizer can be applied about once every 15 days. After the start of the dog days, most branch tips have stopped growing; this is the high-temperature season, physiological activity weakens, and supplementary fertilization can be stopped. After autumn, the climate gradually becomes cooler, and there are often continuous autumn rains; the temperature and humidity are suitable for azalea growth, and at this time the last supplementary fertilizer can be applied. After winter begins, fertilizing is generally not advisable.
(5) Pruning
Pruning and shaping is an important measure in daily maintenance and management work. It can regulate growth and development, thereby making the plant grow vigorously. In daily pruning, a small number of diseased branches and weak old branches should be cut off, and some overly dense branches should be removed in combination with the shape of the crown, increasing ventilation and light penetration, which is beneficial to plant growth.
(6) Pinching
During the bud stage, buds should be removed in a timely manner, so that nutrients are supplied in a concentrated way, promoting larger flowers and more vivid colors.
(7)) Placement and Display
Potted plants should not be placed on the ground, but rather on a flower stand or an upside-down empty flower pot, with a shading net or curtain hung above, and they should be kept.
The above is the azalea monitoring function and care guide compiled by the Huinong website editors. Have you all learned it? Azaleas not only bloom beautifully but also have a monitoring function; friends who like growing flowers should not miss them.