Psidium cattleianum

Guava

Family: Myrtaceae

Origin: Brazil

Guava tree with unripe fruit.
A common home orchard fruit tree with small, tangy fruits. Hardy tree growing up to 3m tall.
Photo credit: Forest and Kim Starr

Regional Pest Management Plan (RPMP) status

  • Whole region — Sustained control
  • Hauraki Gulf Controlled Area Notice pest

View more about the RPMP statuses

General description

Large shrub or small tree < 6 m tall. Leaves are smooth, oval and < 5 cm long. Flowers are white and borne in January – March. Fruit is round, 2 cm in diameter and green, ripening to dark purple/red in June – August.

What you need to know

To help protect our environment, from 1 September 2021, you:

  • will not be allowed to breed, distribute, release or sell guava within the Auckland region.
  • will not be allowed to plant guava within the Auckland region, unless you are transferring an existing plant on your land to another location within the boundaries of the same property.
  • must destroy any guava on land that you occupy if it has been planted in breach of the above rules and you are directed to do so by an authorised person.

Habitats

Forest, shrub, gardens, plantations.

Dispersal

Seeds dispersed by birds and mammals. Vegetative spread from suckering.

Impact on environment

Can form monocultures and invade intact native forest vegetation. Reduces native recruitment and restructures the vegetation profile of forests. May exacerbate impacts from animal pests such as possums and feral pigs by providing an important food source.

Control

Site Management

Follow up treated areas 3 times per year. Encourage natural regeneration of native plants or replant treated areas where possible after 2-3 treatments to establish dense ground cover and minimise reinvasion.

Recommended approaches

Physical control

Method: Dig out.

Plant parts requiring disposal: Seeds.

Disposal options: Remove to greenwaste or landfill if practical.

Biocontrol

Biocontrol is currently not available for this species.

Community agrichemical control recommendations

No qualifications: Cut stump and paste freshly cut base of stems with metsulfuron gel. Large stems can be frilled and pasted with metsulfuron gel.

Basic Growsafe certified: Cut stump and spray freshly cut base with 5g metsulfuron-methyl per 1 L of water.

Certified Handler/Experienced agrichemical user: Foliar spray with 5g metsulfuron-methyl per 10L of water and 20ml penetrant.

Caution: When using any herbicide or pesticide please read the label thoroughly to ensure that all instructions and safety requirements are followed.

Close up of  Red Guava fruit beside immature fruit.
Fruit are green when immature then ripen to red or yellow. Fruit are used in jams and jellies.
Photo credit: Forest and Kim Starr
View of Guava canopy branches and unripe fruit.
Native birds like to eat ripe guavas and spread seed into native bush. Seeds can germinate in most conditions.
Photo credit: Forest and Kim Starr
View of mature Guava tree trunk and branches with unripe fruit.
There are many types of guava in the world. NZ orchards like small yellow or red guava trees.
Photo credit: Forest and Kim Starr
Red guava branch with single guava fruit.
A common home orchard fruit tree, a fast growing small tree that produces large amounts of red fruit. Fruit can be eaten or cooked and made into jams and jellies.