Dates have been a
staple food of the
Middle East for thousands of years. They are believed to have originated around the
Persian Gulf, and have been cultivated since ancient times from
Mesopotamia to prehistoric
Egypt, possibly as early as 4000 BCE. There is archaeological evidence of date cultivation in eastern
Arabia in 6000 BCE (Alvarez-Mon 2006).In later times, Arabs spread dates around South & South East Asia, northern Africa, and
Spain. Dates were introduced into
Mexico and
California by the Spaniards by
1765, around
Mission San Ignacio
The
fruit is a
drupe known as a date. They are oval-cylindrical, 3–7 cm long, and 2–3 cm diameter, and when unripe, range from bright red to bright yellow in colour, depending on variety. Dates contain a single
seed about 2–2.5 cm long and 6–8 mm thick. Three main
cultivar groups of date exist; soft (e.g. 'Barhee', 'Halawy', 'Khadrawy', 'Medjool'), semi-dry (e.g. 'Dayri', 'Deglet Noor', 'Zahidi'), and dry (e.g. 'Thoory'). The type of fruit depends on the
glucose,
fructose and
sucrose content.

The Date Palm is
dioecious, having separate male and female plants. They can be easily grown from seed, but only 50% of seedlings will be female and hence fruit bearing, and dates from seedling plants are often smaller and of poorer quality. Most commercial plantations thus use
cuttings of heavily cropping cultivars, mainly 'Medjool' as this cultivar produces particularly high yields of large, sweet fruit. Plants grown from cuttings will fruit 2–3 years earlier than seedling plants.

Dates are naturally wind
pollinated but in both traditional
oasis horticulture and in the modern commercial orchards they are entirely pollinated manually. Natural pollination occurs with about an equal number of male and female plants. However, with assistance, one male can
pollenize up to 100 females. Since the males are of value only as pollenizers, this allows the growers to use their resources for many more fruit producing female plants. Some growers do not even maintain any male plants as male flowers become available at local markets at pollination time. Manual pollination is done by skilled labourers on
ladders, or in some areas such as
Iraq they climb the tree using a special climbing tool that wraps around the tree trunk and the climber's back to keep him attached to the trunk while climbing. Less often the
pollen may be blown onto the female flowers by wind
machine.
Parthenocarpic cultivars are available but the seedless fruit is smaller and of lower quality.Dates ripen in four stages, which are known throughout the world by their
Arabic names kimri (unripe), khalal (full-size, crunchy), rutab (ripe, soft), tamr (ripe, sun-dried). A 100
gram portion of fresh dates is a premium source of
vitamin C and supplies 230
kcal (960
kJ) of energy. Since dates contain relatively little water, they do not become much more concentrated upon drying, although the vitamin C is lost in the process.Dates are an important traditional crop in
Iraq,
Arabia, and north Africa west to
Morocco and are mentioned in many places in the
Quran. In
Islamic countries, dates and yogurt or milk are a traditional first meal when the sun sets during
Ramadan. Dates (especially Medjool and
Deglet Noor) are also cultivated in southern
California and
Arizona in the
United States.
Date palms can take 4 to 7 years after planting before they will bear fruit, and produce viable yields for commercial harvest between 7 to 10 years. Mature date palms can produce 80–120 kilograms (176–264
lbs) of dates per harvest season, although they do not all ripen at the same time so several harvests are required. In order to get fruit of marketable quality, the bunches of dates must be thinned and bagged or covered before ripening so that the remaining fruits grow larger and are protected from weather & pests such as birds.