Plant Summer Bulbs
April is the month to plant summer-flowering bulbs, rhizomes, and tubers such as gladiolas, lilies, begonias, and cannas. Mix bulb fertilizer, composted manure, or peat moss into the planting holes to give your bulbs a boost, and keep the soil well watered.
Move Fuchsias Outdoors
The danger of frost has passed, so it's time to move overwintered fuchsias and geraniums back outdoors. Trim the plants back by as much as half, feed them, and repot them if necessary, then water them well and place them in a protected spot in the garden.
Clean Garden Tools
Gardeners are only as good as the tools they use. Clean, sharpen, and repair all tools now so you won't waste time during the growing season. Also, change the oil in mowers and sharpen their blades. Dull mower blades cut the grass coarsely and make it more susceptible to diseases.
Find a sunny spot to plant an herb garden. If you have no space in a prepared bed, plant herbs in pots. Herbs not only are culinary and medicinal, they are attractive too. Plant a mix of culinary herbs such as basil, medicinal herbs such as chamomile, and beautiful herbs such as purple sage.
Design for Color
Think about colors when designing your flower garden. Complementary colors (violet and yellow, blue and orange, red and green) intensify each other. And neutral or subdued hues planted between brilliant colors will prevent clashes and make the brighter colors more prominent.