Answer: Unfortunately, there are no plants that withstand repeated "fertilizing" with dog urine. If dogs routinely visit your friends garden, she can try one of the commercial pet repellents available at stores and via mail order, or she can erect a fence barrier to protect the plants.
As for your neutralizing the affect of fertilizer, it depends on what type of fertilizer you've used. If it is a water-soluble type, like Miracle-Gro, then repeated flushing with fresh water will help it move out of the soil more quickly. If you have used too much lime and have made your soil too alkaline, then an acidifying fertilizer can help plants that may be suffering. The best thing to do is have your soil tested and get a professional recommendation. Your extension service (ph#808/956-7138) can help you with the test.
True annual plants live only one year. The production of seeds is what triggers their death. Many tender perennial plants are grown as annuals in colder climates. I hope this information is helpful!
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