Kiwifruit

Kiwifruit is grown as a long-lived, deciduous vine supported on a permanent trellis or pergola structure. Once established, a planting can remain productive for many years, making trellis design, cultivar choice, and pollinizer arrangement long-term decisions made largely at establishment.

Green kiwifruit (Actinidia deliciosa) and gold kiwifruit (Actinidia chinensis) are the two principal commercial types, differing in skin texture, flesh color, and flavor, with cultivar-specific management practices in each case.

Family

Actinidiaceae

Genus

Actinidia

Principal species

Actinidia deliciosa (fuzzy/green kiwifruit) and Actinidia chinensis (gold kiwifruit)

Growth habit

Vigorous, climbing, deciduous woody vine (liana), not a freestanding tree

Reproductive habit

Predominantly dioecious, with separate male and female vines; female flowers require pollination from a male vine to set fruit

Kiwifruit originates from wild Actinidia species native to central and eastern China. Selection and breeding, followed by international spread and commercialization during the twentieth century, established it as a globally traded fruit grown in a number of temperate and mild-winter regions outside its native range.

Kiwifruit vines require a period of winter chilling to break dormancy and flower normally, similar to other temperate deciduous fruit crops, with the specific chilling need varying by species and cultivar.

Spring frost is a significant risk, since new growth and flowers emerging after bud break are frost-sensitive and can be damaged or destroyed by a late cold event, potentially reducing or eliminating that season’s crop.

Kiwifruit performs best on deep, well-drained loam and sandy soils with good moisture-holding capacity. The vine’s vigorous root system benefits from soil depth and structure, and it has poor tolerance of waterlogging.

Because kiwifruit is a climbing vine rather than a self-supporting tree, establishing a planting centers on building a permanent trellis or pergola structure strong enough to support the vine’s weight and vigorous growth over many years, alongside selecting compatible male and female vines.

• Trellis or pergola structure selection and construction as a permanent, load-bearing framework
• Selection of compatible male pollinizer and female fruiting vines, interplanted so pollinators are within reach of flowering female vines
• Training young vines onto the support structure and establishing a permanent framework of cordons or canes
• Ongoing pruning to manage vine vigor, light exposure, and fruiting wood renewal across many productive years

Nitrogen supports vine vigor and canopy development, which must be balanced against excessive shading of fruiting wood. Potassium influences fruit size and quality, while calcium is associated with fruit firmness and storage quality, as in many other tree and vine fruits.

Kiwifruit vines have a relatively high water demand due to their large leaf area and vigorous growth habit. Drip irrigation is widely used in commercial plantings to supply water efficiently to the root zone while managing canopy humidity.

Irrigation scheduling aims to avoid water stress during flowering and fruit development while preventing waterlogging, to which the vine’s root system is sensitive.

Bacterial canker of kiwifruit, caused by Pseudomonas syringae pv. actinidiae (commonly referred to as Psa), is a serious bacterial disease of the vine and wood that causes cankers, dieback, and, in severe cases, vine death, rather than merely superficial leaf spotting. It has caused serious documented disruption to kiwifruit industries in several major growing regions historically and remains a significant ongoing risk factor requiring careful biosecurity and orchard hygiene practices. Gray mold can affect flowers, fruit, and stored fruit, particularly under cool, humid conditions.

Leaf rollers, scale insects, and thrips are common insect pests that can affect foliage and fruit finish.

Management combines disease-tolerant cultivars and rootstocks where available, strict sanitation and biosecurity practices, monitoring, and — where justified — locally authorized control products applied according to their labels.

Kiwifruit is harvested by hand once fruit reaches a maturity standard, commonly assessed through internal indicators such as soluble solids content, since the fruit continues to ripen and soften significantly after picking during storage and handling.

• Fresh-market eating fruit
• Juice, purée, and processed fruit products
• Use in baked goods and prepared foods