Guava

Psidium guajava
Guava (Psidium guajava) is an evergreen shrub or small tree primarily cultivated in tropical and subtropical regions. This document explains the growth characteristics, propagation methods, cultivation techniques, garden uses, and major pests and diseases, as well as control methods.

Growth Characteristics
- Climate: Guava prefers a warm and humid climate and thrives when temperatures are above 15°C. It is sensitive to cold, so care must be taken to avoid exposure to frost or low temperatures.
- Soil: It grows best in well-drained soil and is suitable for soils with a pH between 4.5 and 7.0.
- Water: Moderate watering is required; however, care must be taken as excessive watering can cause root rot.
- Sunlight: A location with ample sunlight is suitable. While it can grow in some shade, fruit yield may decrease.

Propagation Methods
- Seeds: Seeds germinate easily, but genetic mutations may occur. Germination occurs within two weeks, and harvesting is possible after 3 to 8 years.
- Grafting and Cuttings: Grafting and cuttings are useful when cultivating specific guava varieties. This allows for earlier harvesting, with fruit bearing occurring within approximately two years.

Cultivation Methods
- Planting: Plant trees at appropriate intervals (usually 6-10 m). It is important to provide an environment with good drainage.
- Fertilization: Growing trees require regular fertilizer containing nitrogen, phosphorus, and potassium. Generally, it is recommended to fertilize three times a year.
- Pruning: Pruning is necessary to shape the tree and prevent pests and diseases. Branches should be trimmed to ensure good ventilation and sunlight penetration.

Uses in the Garden
As an edible fruit tree, the guava is an excellent focal point for a garden. It can also be used as a windbreak or hedge. Its fragrant flowers and fruit make the garden even more attractive.

Major Pests and Diseases and Control Methods
- Guava Mosaic Virus: Remove infected parts and thoroughly manage the pests that transmit them.
- Powdery Mildew: Control the fungus using sulfur or fungicides.
- Guava Moth: Remove unnecessary branches and control them using insecticides.
- Scale Insects: Wash them off with soapy water and thoroughly eliminate them using insecticides.

By following these methods, you can grow healthy guavas. Regular observation and care are important, and it is crucial to respond promptly when pests or diseases occur.
Plant Type
Plant Family	Myrtle and
Height	3∼7m
Spread
Colors	yellow
Bloom Period	May~June
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-3°C
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Pseudotsuga menziesii
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