Cultivation Methods and Technical Key Points for Guzmania

Guzmania is also known as the flaming sword bromeliad, red cup bromeliad, and scarlet star. It is a perennial herbaceous plant. The leaves are long and strap-shaped, light green, slightly red on the underside, thin and glossy. The spike inflorescence rises above the leaf rosette, and the flower stalk, bracts, and several leaves at the base are bright red. Guzmania has emerald-green, glossy leaves and deep red tubular bracts whose vivid color lasts a long time, making it one of the most popular potted flowers on the world flower market today. Guzmania is an indoor potted plant grown for both foliage and flowers, and it can also be used as a cut flower. It is suitable for year-round enjoyment beside a bright indoor window, as both its leaves and flowers are ornamental.

Guzmania care methods:

[Light management]: It originally lived in the partial shade of shrublands from the temperate to warm temperate zones or on the northwest side of hillsides, where it could receive partial, intermittent direct sunlight each day. During the hot summer period (when daytime temperatures are above 33°C), if it is kept in direct sunlight, it will grow very slowly or enter a semi-dormant state, and its leaves will also be scorched and gradually turn yellow and drop off. Therefore, in the hot summer it should be given about 50% shade. In spring, autumn, and winter, since temperatures are not very high, it can appropriately be given direct sunlight to help it carry out photosynthesis and form flower buds and bloom.

[Temperature management]: Because it originates from tropical or subtropical regions and likes high-temperature, high-humidity environments, it has strict requirements for winter temperatures. When temperatures fall below 3-6°C, it cannot overwinter safely; in summer, it can tolerate temperatures as high as above 35°C, but growth will be temporarily hindered. The most suitable growing temperature is 18-30°C.

1. In a growing environment above 34°C, the correct handling methods are:

(1) Increase air convection as much as possible to facilitate transpiration and bring down its internal temperature;

(2) Mist the leaf surface, 2-4 times per day: the higher the temperature, the more times accordingly. When the temperature is lower or on cloudy and rainy days, mist less or not at all;

(3) Wet the ground around it, which is very helpful for lowering the ambient temperature around it.

2. In a growing environment below 6°C, the correct handling methods are:

(1) Wrap it in plastic film to overwinter, but every two days at the warmer midday period, uncover the film to let it breathe;

(2) Move it to a heated indoor space to overwinter;

[Humidity management]: The relative air humidity of the growing environment should be above 65%. When the relative air humidity of its growing environment is too low (at which point human skin feels dry and one is prone to thirst), for example, when it is placed in an indoor space where doors and windows are often closed or in an air-conditioned environment, or on a concrete balcony, its stems will droop downward and its leaves will bend downward. Over time, its entire plant shape will be ruined and it will lose its ornamental value, and at the same time its growth will become very weak.

When the relative air humidity of its growing environment is too high (above 85% for a long time, at which point one feels very humid or muggy), it will cause its leaves to temporarily stop transpiration and its growth to weaken. Over time, this will lead to the occurrence of various diseases. Its favorite relative air humidity is 65%-75%. When the relative air humidity is below 60%, such as in an air-conditioned environment or an unventilated indoor environment, it can be adjusted by misting the leaf surface, or a dish filled with water can be placed under the pot.

[Fertilizer and water management]: It has high fertilizer and water requirements, but it is most afraid of improper fertilization, concentrated fertilizer, and one-sided application of nitrogen, phosphorus, or potassium fertilizer. It requires following the fertilization (and watering) principle of "light fertilizer applied frequently, small amounts with more frequent applications, and complete nutrition."

Guzmania likes to grow in fertile, well-drained conditions. During the growing period, attention should be paid to fertilizer and water management. It has high fertilizer and water requirements, so follow the principle of light fertilizer applied frequently, small amounts with more frequent applications, and complete nutrition.

Guzmania flowering period

Guzmania blooms only once in its lifetime, in spring. The flower stalk usually rises more than 20 cm above the leaf rosette, and the flower stalk, bracts, and several leaves near the base of the flower stalk are all dark red, remaining so for a very long time, with an ornamental period of up to about 3 months.

Guzmania's spike inflorescence rises above the leaf rosette, and the flower stalk, bracts, and several leaves at the base are bright red. The flowers are small and white. Guzmania has emerald-green, glossy leaves and deep red tubular bracts whose vivid color lasts a long time, making it one of the most popular potted flowers on the world flower market today. Common horticultural cultivars include red star guzmania, torch guzmania, and others.