Kumquat is a citrus for which you can eat the skin together with the cute fruits.
Key Kumquat facts
Name – Fortunella japonica
Family – Rutaceae (Rue family)
Type – fruit shrub
Foliage – evergreen
Height – 6 to 13 feet (2 to 4 meters)
Exposure – full sun
Harvest – November to January
The planting, repotting, care, watering and pruning of kumquat are steps to take to grow a very nice plant.
Planting and repotting kumquat
Planting kumquat in pots
It is recommended to plant kumquat in a blend of soil mix preferably enriched with fertilizer.
- The pot must absolutely be holed at the bottom to avoid having the roots stagnate in water.
An ideal solution is to pour in a layer of gravel, clay pebbles or rocks. This ensures excess water drains well to the bottom.
Make this layer about 1 to 2 inches (3 to 4 cm) thick.
Anticipate repotting in a pot that is slightly larger than the previous every 2 or 3 years on average.
- Repot in spring or at the end of summer.
- Follow our lead on how to repot your kumquat
- If the pot is too large, however, a good choice is to topdress with new soil.
It will only grow directly in the ground in Mediterranean-type climates or tropical climates.
Although it has been seen to resist temperatures as low as 17°F (-8°C) and even 14°F (-10°C), it must necessarily be planted under wind shelter and in full sun.
In which case, mix soil mix into your garden soil and ensure that your soil drains well.
If it doesn’t drain well, dig a hole that is slightly deeper, and layer gravel, rocks, sand or clay pebbles along the bottom.
- Propagate kumquat through layering.
Pruning and caring for kumquat
To rebalance the silhouette of your kumquat, prune lightly in spring after the harvest, or just after repotting if it is a potted specimen.
You can also input citrus plant fertilizer during the entire growing phase.
In winter, if you fear particularly strong freezing and it is grown in a pot, bring it in a cool and well-lit room where it never freezes.
Although the kumquat can resist to freezing temperatures, its fruits will fall with the first frost.
Indoors, water regularly but not too much as soon as the soil is dry.
In winter, space the watering in order to let the soil dry up deep down before watering again.
Learn more about Kumquat
Indoors and in a pot, simply set it in a well-lit spot but avoid direct sunlight during the hottest hours.
In winter, it needs relatively lower temperatures and would not resist the heat inside a house or apartment. Ideally you’d find a luminous room for it where the temperature won’t drop below freezing. A greenhouse or lean-in would be perfect, for instance.
Diseases and parasites of Kumquat
Smart tip about Kumquat
Regular adding of citrus plant fertilizer will greatly increase blooming and fruit formation of your kumquat.
Credits for images shared to Nature & Garden (all edits by Gaspard Lorthiois):
Single kumquat by Jacqueline Macou ★ under Pixabay license
Kumquat growing outdoor by Jan Friedrich under © CC BY-NC-ND 2.0
Kumquat tree with fruit by Hans Braxmeier under Pixabay license
Kumquat harvest by Nicola Giordano under Pixabay license