Flower shower question

How can I effectively add potassium and phosphorus to soil? Does cactus have xylem and phloem? Why might a candle burn longer with a plant? What growing conditions does a sweet almond tree need? How can I successfully grow avocados in pots? Why is it important to be responsible in our use of fertilizer? Are tulips unicellular? What tree has very large leaves and flowers that look like orchids and grows well in Texas near the Gulf Coast? Why has a blue spruce tree has turned brown in places? Will cherries ripen after picking? What conditions does a manuka tree like to grow in? What is a shrub that growns on mountains called? Does organic fertilizer yeild better results than synthetic? Is 20 20 20 all purpose fertilizer ideal for maple trees? What type of soil do evergreen conifers need to survive? Can broccoli tolerate frost, or does it require protection from cold temperatures? How do red leaved plants grow? How can I properly replant tulip bulbs to ensure they thrive in the next growing season? What plants clean the soil? Why are the leaves curling on my tomato plant?