The tree seedlings are dipped in mycorrhizal fungi slurry. Given the right conditions and care, the truffles could be harvested in about six to ten years. It is nearly impossible to grow truffles in a greenhouse. Trees are very essential on its growth. Soil - Aside from the trees, it is also important to prepare the soil where the trees would be planted. Common Sources of Truffles: Where to Find Them History has it that truffles trace their roots to France. Others say that truffles had been part of Roman and Greek civilizations, mainly as a delicacy, medicine, or even an aphrodisiac. Regardless of where the very first truffle fungus sprouted, this mushroom is found practically everywhere in the world, albeit in different amounts. That s too time-consuming and laborious a task, unless it s your hobby. When shopping for truffles, smell them to check their odor intensity and freshness. Truffles that have been stocked for a long time gradually lose their strong smell. Also, go for truffles that are well-textured, evenly shaped, blemish-free, and firm. Okay, that might make you cringe. But then, the fact that truffles elicit a sensual feeling cannot be dismissed outright. The incredible aphrodisiac powers of truffles have been felt not only by the ancient Greeks and the Romans, but also by modern-day gourmet chefs and connoisseurs. It is interesting to note, though, that such a power in fact has no scientific basis. Oregon Black Truffles Larger and less popular than Oregon white truffles, the Oregon blacks emit a strong earthy smell when they are mature. Their exterior and interior are both dark colored. They appear like rough lumps of coal with a texture of ground almonds and moist Parmesan. 8. Oregon Brown Truffles Cultivated in Douglas-fir forests, Oregon brown truffles have a gray meat and reddish brown outer covering. When dried, it has only about two to eight percent of fat which are mostly crude fat and lipid compounds such as fatty acids, sterols, phospholipids, glycerides and linoleic acid. 4. It is cholesterol free. This is probably the biggest health benefit of truffles. Through the years, cholesterol has been considered as of the risk factors of coronary heart conditions and other related diseases.