Plus, find out what our California native plant of the week will be.
July is the ideal month to assess our need for trees. We may not even want to step out into the garden because of blistering heat, which could easily be mitigated by planting trees that cool the air, however.
Of course, the function of transpiration is not merely to keep leaves cool, but also to bring the hydrogen in water molecules up to leaves where photosynthesis, the process by which plants make their own food, takes place. Photosynthesis uses solar energy to split apart the hydrogen and oxygen elements of which water consists. Hydrogen atoms from water combine with carbon and oxygen atoms from carbon dioxide to make carbohydrate or sugar, the self-made food that sustains plants.
I was keenly interested in finding out which trees the authors recommend for planting in our part of the country. Several oak trees are recommended including the cork oak , a mature specimen of which is growing on the northeast corner of Van Nuys-Sherman Oaks Park on Hazeltine Avenue. Cork oak is noteworthy due to its spongy, hydrophobic bark.
Cork oak forests are in danger of disappearing, but not due to overharvesting or mismanagement. The problem is that corks made of plastic and silicone are less expensive than real cork and these stoppers are gaining wider acceptance, resulting in less demand for cork and subsequent neglect of cork oak forests. Still, nearly all premium wines continue to be stoppered with cork.
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