What is the formula for average age of a plant?

What is a kickweed? How long does it take for a sunflower to sprout? Are Early Girl Tomatoes a man made hybrid or plant made hybrids? How long does a marri tree live for? Can sunflowers harm cats if eaten? Why is it important to use caution when handling an axe that is stuck in wood? Is lilac and lavender smell alike? English name for Shimul flower? 'what is treated pine'? How does alternation of generation different in fern and pines? What pine tree grows in hot dry southwestern states? Can you use triamcinolone cream for poison ivy? What are the qualities of agapito flores? Who discovered first discovered silk? Why are my cucumber leaves turning white? What country flowers come from? What are some perrenial herbs which are low maintenance? How can I create a beautiful flower bed around a tree in my garden? What structure in ferns is diploid? What kind of grass seed can be planted in the spring?