How to grow Psidium friedrichsthalianum

Psidium friedrichsthalianum growing tree of the genus Psidium also known as Cas or Cas guava, Psidium friedrichsthalianum perennial evergreen plant, can grow in tropic, mediterranean or subtropical climate and growing in hardiness zone 10+.

Flower color green white with five petal,

Psidium friedrichsthalianum fruits

Fruit the taste and the smell sour unique, color is yellow, and size of the fruit can be 3-12 cm, sometime the seeds hard and not edible

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How to grow Psidium friedrichsthalianum growing and care:

Hard prune every 2 years, rich soil, organic matter, hummus, fertilizer 4 times a year

What is the best way to start growing?
Plant / Seed / Vegetative Reproduction

Is it necessary to graft or use vegetative reproduction?
No, but sometimes the can be dry and not very pleasant to eat and some other have really hard seeds that not possible to eat in this case, so need to graft

Difficulties or problems when growing:
There are some years that won’t bear fruits

Planting season:
Spring to summer in hardiness zone 10a, spring to autumn in hardiness zone 10b-11a, all year in hardiness zone 11b+

Pests and diseases:

Pruning season:
Autumn to winter, better to harvest directly after the fruits

How to prune:
Every two years need major prune (after this the fruit become larger)

Size of the plant:
2-7 m, 6-21 feet

Growth speed in optimal condition:
Medium growing in the right condition can be fast growing plant

Water requirement:
Average amount of water to big amount of water

Light conditions in optimal condition for growing:
Full Sun

Is it possible to grow indoor as houseplant?

Growing is also possible in a planter /flowerpot / containers:
Yes, start with pot that will be 20% more than the root ball, every time that the tree arrive to full capacity need to switch to bigger until arrives to desirable size, it will bear fruits also in 25gallon (94 liter) container not a lot and bigger is better, better to use this method because the soil lose the viability over time and it’s efficient of care for the tree, when the plant big need to switch part of the soil, drainage it’s important and need to make holes and to use peat soil and maybe some lava grit in the bottom or something like that, put a bottom for the container and when water the plant let it fill the bottom but also need to dry in the same day, better when it’s grow in container to grow it as shrub, better to graft the tree or start from air layering will ensure the fruits.

Blooming information

Bloom season:
Spring / Summer (in hardiness zone 12+ can bloom most of the year)

General information about the flower
White flowers

Pollination is done by:

Edible fruits

Fruit harvest season:
Summer to autumn (in hardiness zone 12+ can bloom most of the year)

Fruits pests or diseases:
Fruit fly (a lot of time the eggs of the fruits fly die in the fruits because of the acidity, birds

What can be done with big quantities of Psidium friedrichsthalianum fruits?
Juice, Eat raw, ice-cream

Work requirements on the fruit:
Cover with net or traps for fruit fly

How long does it take to bear fruit?
2-4 year

Scientific name:

Psidium friedrichsthalianum

Alternative names: Cas guava, Cas tree, Psidium friedrichsthalium, Costa Rican guava

Blooming Seasons

Edible Parts

Culinary Uses

Flower Colors


Harvest season

Ornamental parts

Plant growing speed

Plant life-form

Plant uses

Planting season

Plants sun exposure

Watering plants

Hardiness zone