secondary
Persian lime
sweet lime / nimbu (نمبو)[unverified]
Citrus latifolia cv. Bearss
- punjab plains
- sindh coast
International hardiness
- USDA 9-11
- RHS H2
- AU: Tropical, Subtropical, Warm temperate, Mediterranean
The Persian lime (Citrus × latifolia cv. ‘Bearss’), also sold as Tahiti lime, is the large, seedless lime found in most grocery stores and the backbone of countless kitchens and bar carts.14 It is a vigorous, nearly thornless evergreen citrus tree that is not known in the wild at all — it exists only in cultivation, a hybrid whose ultimate origins trace to Southeast Asia, from northeastern India and northern Myanmar through southwest China and out across the Malay Archipelago.12 For a homesteader in a warm, frost-free climate, its appeal is hard to beat: one self-fertile tree gives juicy, seedless fruit over a long season, it stays compact enough to keep, and it grows happily in a large pot that can be wheeled indoors where winters bite.145
Persian lime is a triploid hybrid — UF/IFAS describes it as a probable complex cross of citron (C. medica), pummelo (C. grandis), and Citrus micrantha — and that triploid sterility is exactly why the fruit comes out seedless or nearly so.21 The ‘Bearss’ cultivar is a selected seedless form first described from California in the late 19th century; the ‘Tahiti’ name records its arrival in California from Tahiti somewhere between 1850 and 1880.12
Identifying Persian lime
It is an evergreen tree with a dense, rounded crown and glossy citrus foliage, vigorous in habit and notably nearly thornless to thornless — a useful tell that sets it apart from many other citrus.14 Mature trees run roughly 12–15 ft tall with a 14–16 ft spread for the ‘Bearss’ selection, though Persian/Tahiti lime in general is sometimes given as 15–20 ft tall and wide.5 The fruit is closer in size to a lemon than to a small Key lime — about 6 cm (2.4 in) across, often with a slightly nippled apex — with a thin to medium rind that is green at harvest.53 Inside, the flesh is translucent pale green, tender, and very juicy, with a clean acid lime flavor that is a touch less aromatic and less sharp than a Mexican/Key lime.435 Its seedlessness is the headline trait and the reason it is simply called the “seedless lime.”14
Growing Persian lime
Because the cultivar is seedless and triploid, seed will not reproduce it true to type — propagation has to be vegetative.14 Commercially, ‘Bearss’ is a conventional grafted citrus, budded onto suitable citrus rootstocks in the standard industry way.2 At a home scale, Gardenia describes raising it from semi-hardwood cuttings: take 6–8 inch cuttings from healthy branches, dip the base in rooting hormone, insert into a moist, well-draining medium such as a perlite/peat mix, and keep them under high humidity in bright indirect light, where they root in about 6–8 weeks.4
This is a warm-climate tree. Gardenia and Whitfill both place it in USDA zones 9–11, while Buchanan’s lists it as hardy to zone 8b in favorable, protected microclimates.45 It performs best in subtropical to tropical conditions in full sun, and cold damage begins to set in below about 28°F (-2°C).4 In cooler regions the standard approach is to grow it as a container plant and overwinter it indoors, a practice the nearly thornless, ornamental habit makes pleasant rather than hazardous.45 Reliable region-specific figures for spacing, exact time to maturity, and detailed soil prep are not given in the sources consulted here, so they are deliberately left out rather than guessed; in practice, treat it like other grafted citrus — full sun, free-draining soil, and steady moisture.24
Harvest and uses
Persian lime is grown above all as a fresh, seedless culinary fruit, and it is the commercial “seedless lime” of the produce aisle.14 The fruit is picked green, when the thin rind and very juicy, acid flesh are at their best for juicing, zesting, and cooking; the flavor is straightforward and tart rather than sweet.54 Beyond the kitchen, the tree earns its keep as an ornamental and container specimen thanks to its glossy evergreen foliage, rounded form, and thornless branches.14 The sources here do not give a documented per-tree yield figure, so none is stated; what they do make clear is that a single tree is productive on its own, since the seedless fruit sets without needing a pollinator partner.13
Safety and cautions
Persian lime is edible and widely used as a food, with no toxicity concern from eating the fruit.1 The cautions are narrow and worth knowing. Like other citrus, the peel oil can cause photosensitive skin reactions — contact with lime peel or juice followed by sun exposure can lead to a phototoxic rash — so handle and zest with that in mind on bright days.13 And, as with citrus generally, lime may interact with some medications when used in medicinal quantities; that is a general citrus caution, not a claim that this fruit treats anything.13 This profile makes no medical claims for Persian lime.