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Various citrus trees can be grown from seed indoors fairly easily and make a beautiful houseplant. It can take as long as 10-15 years for a lemon tree to produce fruit, but in the meantime the ...
The Royal Botanic Gardens in Sydney have published information on how to grow Wollemi pines from seed which has been harvested from helicopters from the forest trees. The majority of seeds that fall from the cone are not viable so need to be sorted to retain the plump and dark ones. These can then be sown on top of seed raising mix and watered.
Pine trees are evergreen, coniferous resinous trees (or, rarely, shrubs) growing 3–80 metres (10–260 feet) tall, with the majority of species reaching 15–45 m (50–150 ft) tall. [7] The smallest are Siberian dwarf pine and Potosi pinyon, and the tallest is an 83.45 m (273.8 ft) tall sugar pine located in Yosemite National Park. [8]
The cones thus grow over a two-year (26-month) cycle, so that newer green and older, seed-bearing or open brown cones are on the tree at the same time. Open cone with empty pine nuts. The seed cones open to 6–9 cm (2 + 1 ⁄ 4 – 3 + 1 ⁄ 2 in) broad when mature, holding the seeds on the scales after opening.
Many pine trees turn yellow this time of year because of normal “needle drop” on the inside branches
The Torrey pine (Pinus torreyana) is a rare pine species in California, United States. It is a critically endangered species growing only in coastal San Diego County, and on Santa Rosa Island, offshore from Santa Barbara in Santa Barbara County. [3] The Torrey pine is endemic to the California coastal sage and chaparral ecoregion. [4] [5]
Pinyon pine trees are also known to influence the soil in which they grow by increasing concentrations of both macronutrients and micronutrients. [3] Some of the species are known to hybridize, the most notable ones being P. quadrifolia with P. monophylla, and P. edulis with P. monophylla.
Chilghoza seeds, or pine nuts, are harvested for consumption in autumn and early winter by knocking the cones off of the trees. The trees and seed harvesting rights are owned by local mountain clans and villages in some areas, from which they may be exported to markets in the northern Indian plains.
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