U-boats. U-boats were German submarines that caused havoc in World War Two during the Battle of the Atlantic. U-boats were so damaging that Winston Churchill commented that it was the only time in World War Two that he thought Britain would have to contemplate surrendering.rom 1918 on, Germany was technically not allowed to have submarines or submarine crews. However, no mechanisms were in place to stop research into submarines in Germany and it became clear that during the 1930âs, Germany had been investing time and men into submarines.
Mountain laurel thrives in well-draining, acidic soil with a pH ranging from 5.0 to 5.5. Use a soil pH testing kit -- available at garden centers or home improvement stores -- to test your soil. If the soil in the planting area is higher than 5.5, mix 1 to 2 inches of sphagnum peat moss into the soil's top 6 inches.
Joshua Tree. The Joshua Tree, or yucca brevifolia, is a unique tree that only grows in the desert in parts of California, Arizona, Utah and Nevada. It prefers the higher elevations of 2000 to 6000 feet.Hardy in gardening zones six through 10, this tree prefers hot, arid growing conditions.o grow a Joshua Tree from seed you will need peat pots that are four to six inches high. Another option is to make pots from newspaper. Fill your pots to within two inches of the top with a well draining soil. Place seeds on top of the soil and cover with one eighth to one quarter inch of soil.