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Citrus: sweet and sour by Malcolm W. Campbell BA, MAIH, MIPPS.

Citrus Lemons and Citrons
The modern lemon is probably a hybrid selection of the species Citrus limon, crossed with an Indian lime and the pummelo and came into cultivation in the west, from the foothills of the Punjab in Pakistan and India. The 'Meyer' lemon is however an orange crossed with the lemon hybrid and comes from China. As a young horticultural student, a lemon to me meant a 'Lisbon' lemon and I was surprised to hear that anyone grew any other. They certainly didn't in Adelaide. After visiting Perth several times over the past few years I was surprised to find that the 'Lisbon' is seldom grown there at all, whereas the 'Eureka' is synonymous with lemon in the west. In Darwin their tropical lemon is a selection of the 'Meyer' lemon, although it looks a bit different.
'Lisbon' lemon (erroneously spelt in some catalogues as 'Lisborn') is the most popular lemon with home gardeners for an all year round crop in Mediterranean climates. It was of course originally from Portugal, introduced to Australia in 1824 and selections from it later exported to California, where they regard it as an Australian lemon! It's heaviest fruit set is however in winter and they set their fruit within the tree, unlike most other lemons. It is frequently seen being buffeted by a howling south westerly wind in winter along Adelaide's coastal areas, still clinging on to its large crop. It's a very large bright yellow oval shaped lemon, when grown well. It makes a huge tree to at least 8 metres in a sheltered spot and can easily be pollarded to make a smaller more manageable tree in small backyards. While it's prone to citrus scale, as most lemons are, they hardly deter the old 'Lisbon' from cropping. I reckon there's nearly one in every garden in the inner suburbs of Adelaide and certainly one in every farmyard orchard from Poochera SA to Manangatang Vic. There are many 'Lisbon' selections, such as 'Prior', 'Limoneira' and 'Frost' , but they are usually all sold to home gardeners as 'Lisbon'.

'Meyer' lemon is the ideal cooler climate lemon, that bears its main crop in summer. It was selected from a lemon x orange x mandarin hybrid found growing near Beijing, China in 1908. The fruits turn a pale orange colour when mature on the tree. They are also rounder than most lemons. It is fairly frost hardy to -2_C and is what could be called, a sweet lemon, if any lemon is worthy of that appellation. The skin is quite soft and lacks the lemon zest flavour. Because of it's cold tolerance it is popular inland, where winter night temperatures often plummet to freezing in winter. is the ideal cooler climate lemon, that bears its main crop in summer. It was selected from a lemon x orange x mandarin hybrid found growing near Beijing, China in 1908. The fruits turn a pale orange colour when mature on the tree. They are also rounder than most lemons. It is fairly frost hardy to -2_C and is what could be called, a sweet lemon, if any lemon is worthy of that appellation. The skin is quite soft and lacks the lemon zest flavour. Because of it's cold tolerance it is popular inland, where winter night temperatures often plummet to freezing in winter.

'Tropical Lemon' is the most the popular lemon in Darwin. It's a selection of 'Meyer', but with a more pronounced neck to the fruit. It's a large mild tasting light green fruit with low acid that yields plenty of juice. The main bumper fruit set is December to March with a smaller set from July to August. is the most the popular lemon in Darwin. It's a selection of 'Meyer', but with a more pronounced neck to the fruit. It's a large mild tasting light green fruit with low acid that yields plenty of juice. The main bumper fruit set is December to March with a smaller set from July to August.

'Eureka' lemon (syn. 'Garey's Eureka') is the preferred lemon in Perth. It makes an open tree and is nearly thornless, cropping all year round in hot coastal areas like Perth, with the bumper season in March-April. The fruit has a pretty rough skin that is often ribbed and a highly acidic flesh, but yields lots of juice. The fruit also has a most prominent nipple at its base. This cultivar originated from Los Angeles in southern California USA, where some imported Italian lemons were germinated and grown-on. This is the most common lemon grown in Israel, California, Argentina and South Africa, so it is the lemon Europeans would have purchased from their super markets and fruit shops. lemon (syn. 'Garey's Eureka') is the preferred lemon in Perth. It makes an open tree and is nearly thornless, cropping all year round in hot coastal areas like Perth, with the bumper season in March-April. The fruit has a pretty rough skin that is often ribbed and a highly acidic flesh, but yields lots of juice. The fruit also has a most prominent nipple at its base. This cultivar originated from Los Angeles in southern California USA, where some imported Italian lemons were germinated and grown-on. This is the most common lemon grown in Israel, California, Argentina and South Africa, so it is the lemon Europeans would have purchased from their super markets and fruit shops.

'Villa Franka' lemon (syn. 'Villafranca') is a large tree to 8 metres with less thorns than the 'Lisbon' and fruit similar to the 'Eureka' lemon. It is reported to be from Sicily in Italy and introduced into Florida USA in 1875. It's main crop is mid winter and although quite acidic, there are very few seeds in the flesh. It is a popular lemon in Queensland, where it produces good summer crops. lemon (syn. 'Villafranca') is a large tree to 8 metres with less thorns than the 'Lisbon' and fruit similar to the 'Eureka' lemon. It is reported to be from Sicily in Italy and introduced into Florida USA in 1875. It's main crop is mid winter and although quite acidic, there are very few seeds in the flesh. It is a popular lemon in Queensland, where it produces good summer crops.

'Lemonade' (syn. "Brisbane Lemon") came to Brisbane from the Pacific Islands in the mid 1980's. Its fruit lacks enough acid to be what I'd call a lemon, since they can easily be eaten as a fresh fruit. Only the brave would do that with a 'Lisbon'. The tree has thorns and bears several heavy crops each year. (syn. "Brisbane Lemon") came to Brisbane from the Pacific Islands in the mid 1980's. Its fruit lacks enough acid to be what I'd call a lemon, since they can easily be eaten as a fresh fruit. Only the brave would do that with a 'Lisbon'. The tree has thorns and bears several heavy crops each year.

'Fino' lemon (syn. 'Primofiori', Mesero' & 'Bianco') is a selected seedless clone from Spain, reputed to be an early maturing variety with excellent quality fruit and capable of enormous fruit set. Elite budwood is currently available to commercial growers, so it may become available to home gardeners in the not too distant future. (syn. 'Primofiori', Mesero' & 'Bianco') is a selected seedless clone from Spain, reputed to be an early maturing variety with excellent quality fruit and capable of enormous fruit set. Elite budwood is currently available to commercial growers, so it may become available to home gardeners in the not too distant future.

'Verna' lemon (syn. 'Berna') is a late season thornless lemon from Spain, with very smooth and uniform fruit that hang for a long time on the tree. This may not interest the home gardener, but now that elite budwood is available to commercial growers, we may see it available for home gardeners in future. (syn. 'Berna') is a late season thornless lemon from Spain, with very smooth and uniform fruit that hang for a long time on the tree. This may not interest the home gardener, but now that elite budwood is available to commercial growers, we may see it available for home gardeners in future.

"Rough Lemon", (syn. "Bush Lemon" or "Citronelle") is often seen on damaged lemon trees where the rootstock becomes dominant. The "Rough Lemon" is quite easily detected by the very rough nature of the fruit and if that's not enough, the mildly sour taste and loads of seeds will convince you! The skin does make good zest for cooking and it's a good rootstock on clay soils. It makes a large tree and has small thorns.

"Citron" Citrus medica. The Medes and Persians used the oils of the "Citron" in medicines at least 2700 years ago and even today the Israelis revere the "Citron". In fact they are about the only nation that grows it on any significant scale. I've seen it planted in the grounds of the Massada College for Hebrew scholars in Glenside SA, but I know they had a difficult task sourcing their "Hadar". The significance of the "Hadar" is that it's used in the Jewish ceremony of Suchot, which varies from dates in September to October, according to the solar calendar. Citrus medica. The Medes and Persians used the oils of the "Citron" in medicines at least 2700 years ago and even today the Israelis revere the "Citron". In fact they are about the only nation that grows it on any significant scale. I've seen it planted in the grounds of the Massada College for Hebrew scholars in Glenside SA, but I know they had a difficult task sourcing their "Hadar". The significance of the "Hadar" is that it's used in the Jewish ceremony of Suchot, which varies from dates in September to October, according to the solar calendar.

"Etrog" in Hebrew is a "Sour Citron", about the size and shape of a 'Lisbon' lemon. I believe it is only used for candied peel production and given that the Kumquat 'Marumi' are so much tastier, I don't know that I'd bother growing it. in Hebrew is a "Sour Citron", about the size and shape of a 'Lisbon' lemon. I believe it is only used for candied peel production and given that the Kumquat 'Marumi' are so much tastier, I don't know that I'd bother growing it.

"Buddha's Hand" is a curiosity citron grown in Japan, China, south east Asia and in California. I haven't seen it in Australia, but photos I've seen from California, show it to be a weird looking fruit with dozens of long finger or tentacle like protrusions. It could only be used for oils, since the flesh is almost non existent. is a curiosity citron grown in Japan, China, south east Asia and in California. I haven't seen it in Australia, but photos I've seen from California, show it to be a weird looking fruit with dozens of long finger or tentacle like protrusions. It could only be used for oils, since the flesh is almost non existent.