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.
Mountain laurel will grow in USDA Zones 5 to 9 in deep shade to full sun, but it does best in moderate to partial shade. In deep shade it won't produce as many flowers and can become spindly. Too-bright sun can cause scorching of the leaves.