Here in Middle Tennessee (Zone 7a, where The Garden Bench calls home), April brings the garden into sharp focus. Where to begin? Here’s a list of suggestions, week by week, of tips and tasks for April in the garden.
Prune forsythia and flowering quince soon after they finish blooming. Prune out about one-third of the branches by cutting out the oldest limbs as close to the ground as possible. Mulch around the shrubs to discourage weeds and to retain moisture.
It’s still too early to set out most vegetable transplants, but not too early to prepare the beds. Till the soil and work in organic matter. Cover with mulch until you are ready to plant.
Begin fertilizing roses after new foliage appears.
Keep your mower blade sharp, and when you mow, don’t cut too short. Set the mower so that it removes only about a third of the height of the grass.
The hummingbirds will arrive soon. Prepare a solution of one part sugar to four parts boiling water. Let it cool, then fill the hummingbird feeders. Red food coloring is not necessary.
Average last frost date in Middle Tennessee is around mid-April. But don’t be fooled by fickle weather. It may still be too cool for some heat-loving plants, such as basil.
Begin planting ornamental grasses and perennials. Make sure they get regular water after planting.
Peonies tend to flop over in heavy rains, so go ahead and place supports around the shoots now. The growing foliage will cover the supports, and the plants will stay upright in the rain.
After spring-flowering bulbs finish flowering, allow the leaves to remain until they can be pulled easily from the ground. This allows time for them to store food for next year’s growth.
Plant your Easter lily in a sunny spot after the flowers fade. Do not place it in the same bed as other lilies, as it can transmit a disease to other plants.
Begin setting out bedding plants. Water plants thoroughly about 12 hours before you plant them. Dig individual holes and place plants at the same depth they grew in their pots. For best performance, break apart and spread tightly wound masses of roots as you plant, and snip off old blossoms. Replace the soil around the roots and water the plants well. Mulch planting beds about in inch deep.
Plant your herb garden: rosemary, thyme, mint, lavender, oregano, parsley and other herbs can go in the garden now. Just to be on the safe side, save tender basil to plant later in the month.
Set out marigolds, cosmos, petunias, begonias and other annual flowers. Plant coleus for color in shady spots, in containers or in the ground.
Sow vegetable seeds and keep them watered, but not soggy, until they germinate. The general rule is about an inch of water a week. Get out the rain gauge!
Set out tomato transplants. Set them deeply in the soil so that only the top few leaves are showing. Plant basil, or set out basil transplants.
Newly planted shrubs need regular, thorough watering to help establish their root systems. Soaker hoses are an efficient way to water.
Plant geraniums in containers or in the ground. They prefer morning sun and afternoon shade.
Pluck young weeds out of the garden as soon as they emerge. It’s easier to keep them out if you get them while they’re small.
If you MUST prune azaleas, do it shortly after they finish blooming. They bloom on the previous year’s growth, so to prune later risks cutting off next years flowers.
Don’t forget about your houseplants. As the weather gets warmer, they need water more frequently. If you have houseplants that spend the summer outdoors, place them in a shady, protected area.
Get out and meet other gardeners this month! Check out the calendar Events calendar at left, and in my newspaper column at Tennessean.com.
Filed under: Garden calendar, Garden Events | Tagged: April gardening, herbs, last frost date, Middle Tennessee garden, plant vegetables, pruning shrubs, spring in the garden | Leave a comment »