You should fertilize in mid April with bone meal or a fertilizer low in nitrogen such as 6-10-10.
You should fertilize once before winter and then another during spring.
Iris do not need covering in winter.
You should cut the flower stalk but leave the leaves so the iris will rebloom next year.
Up to the bearing age you should fertilize four times a year, and after bearing twice a year Cooray
Every time you finish planting crops, a message should pop up asking if you want to ask your neighbors to fertilize your crops. Simply click "accept", and then publish, and it should publish to your wall asking people to fertilize your crops.
You can start with "The Face of Deception," the first book in the Eve Duncan series by Iris Johansen, followed by the rest of the books in chronological order of publication for a more coherent reading experience.
You should fertilize a weeping cherry tree in early spring with a slow release fertilizer. The tree can be pruned at the same time.
No you don't want to fertilize it in winter. It needs to "sleep" wait until spring to fertilize it. In spring you can fertilize with manure if your tree is extremely slow growing or drops leaves. Otherwise, figs do better in many cases with no added fertilizer.
Iris are very hardy. However they can get iris borers and then you should dip the tubers in a mixture of bleach and water. If there are many borers, just throw the tubers away and start over. Plant the new iris in a different location.
You should watch the youtube video.
There are bearded iris, water iris, dwarf iris, Louisiana iris, and siberian iris. There is also blackberry iris.
Fertilizing a lawn will help make it healthier. It is best to fertilize four times a year in the early spring, late spring, summer and in fall.