What to Do in Your Garden in April for More Blooms and Better Harvests

Northern Region

In the northern tier of states, spanning across Minnesota, Michigan, and Maine, spring is arriving. There are still frosts, an odd snowstorm, and some frozen ground, but the signs of spring are all around. Birds are returning, lakes and streams are open again, and depending on exactly how far north you are, the serviceberry, snowdrop, bloodroot, and even daffodils are in bloom.

Edible Garden

Some gardeners in the northern tiers are only a couple of weeks away from their last frost dates, and this is the month to start planting cool-season crops outside. Keep an eye on the long-range weather forecast and delay a bit if a large cold front is moving through.

In April, it’s time to start all the seeds you’ve been waiting on. Even if you didn’t get those peppers, tomatoes, or brassicas started last month, you can still get them a head start now.

Transplant out any lettuce, kale, spinach, and brassicas as you approach 2-3 weeks before your last spring frost date. Don’t forget to harden your seedlings off first.

As the frosts thaw from the ground, gardens will hit that first phase called “as soon as the soil is workable.” It means the soil is no longer frozen, is draining normally, and you can easily use a garden fork or hand trowel. That’s the timeline for planting cool-season crops like onions, spinach, lettuces, brassicas, and peas right into the soil.

Flower Beds, Perennials, and Ornamentals

Herbaceous perennials are likely still pretty sleepy, but fat buds, flowers, and even the start of leaves unfurling are all happening on woodier ornamentals. Once the soil has thawed, it’s prime time for dividing perennials. Clear away old, dead foliage and remove mulch where it has become a matted, wet blanket. Allowing some airflow and drainage now is important to prevent crown rot.

Harden off and transplant snapdragons. Direct sow sweet peas (the flowering kind, not the ones you eat).

Plant bare root nursery stock once it arrives, while it's still dormant.

Keep an eye on your rabbit guards. They are still out there looking for tasty twigs to eat while they wait for more succulent greenery to arrive.

To-Do Checklist

It’s time to mix up your existing compost pile to restore air channels after the winter. Use a garden fork and give it a good tossing.

April up north is a good time to prune roses and other summer-blooming perennials. Don’t prune spring bloomers like lilacs or forsythia yet. Those can wait until after blooming.

Grab an old garden hose and some stakes, and outline the shape for a new garden bed. This is a good month to work on infrastructure before the planting and weeding begin in earnest.

Middle States

In middle-tier states, such as Kansas, Virginia, and Missouri, the grass is greening up, the birds are singing, and the redbuds, flowering cherries, and apple trees are in bloom. Head outside and grab some pictures; many of these spring-blooming beauties only hang around a few days.

Edible Garden

This is the busy planting month. Earlier in April is still the time for focusing on cool-season crops, but by the end of the month, the temperatures will be warming and the frosts may be over.

Finish transplanting broccoli, cabbage, cauliflower, and other brassicas early in the month.
Direct sow all cool-season vegetables in the garden, and begin succession planting 10-14 days after.
Harden off warm-season tomatoes, peppers, okra, eggplants, and the like for planting after your last frost date has passed.
Asparagus and rhubarb harvests begin this month.
Flower Beds, Perennials, and Ornamentals

Spring-flowering bulbs are up, and many perennials are too. Take stock of what hasn’t yet shown new life and inspect it to see if you need to plant a replacement. Look at the crowns, check the twigs for buds and pliability, and brush away a bit of soil to look at the roots. A dead-looking crown and mushy roots indicate a plant that didn’t make it.

Fertilize roses once new growth is a few inches long.
As the soil warms, it’s time to plant gladiolas, dahlias, and other summer-flowering bulbs. Even though they don’t tolerate frost, it will be a couple of weeks after planting before their foliage pops up, so you can sneak a few in the ground the week before your last frost date if the weather forecast looks favorable.
Top dress perennial beds with a layer of compost. Reapply mulch where needed to keep weeds in check.

To-Do Checklist

Now is the time to get ahead of the weeds, while they are still tiny and easily dispatched with a hoe.
Prune spring-flowering shrubs after they have finished blooming.
Remove mulch from strawberry beds early in the month.

Southern Region

In Texas, Georgia, Florida, and other southern states, April is marked by fresh greenery, blooming citrus trees, and warm weather. The gardens start to look busy again, and it’s a great time to be out with your hands in the soil.

Edible Garden

This is a month of change. Early April is often the end of cool-season gardening, and by the end of the month the warm-weather crops are in full swing.

All warm-season crops like cucumbers, corn, beans, and melons can be sown this month.
Remember to plant sweet corn in blocks instead of long rows for better pollination.
Mulch the tomatoes and peppers, if you haven’t already. Get those tomato trellises installed before the plants get too large.
Start succession planting bush beans, sweet corn, and summer squashes.
Sweet potato slips can go in the garden this month.

Flower Beds, Perennials, and Ornamentals

It’s time for end-of-season perennial sales, fixing thin spots in mulch layers, and getting into a pest scouting routine.

Keep an eye out for lacebugs on azaleas and bagworms on junipers and arborvitaes.
Plant caladiums once the soil warms.
Set out and plant all the warm-season annuals purchased from the garden center.
Keep up with weeding. Extra effort now is rewarded later.

To-Do Checklist

Warm weather is coming. Check your irrigation system to verify outputs. If you use a drip-type system, use a measuring cup to check how much water it emits in an hour. For sprinklers, put your rain gauge out and do the same. Test several spots in the pattern or drip line.
Buy mulch in bulk and apply a 2-3 inch layer in perennial beds. It will help reduce water loss in summer and keep soil temperatures a little cooler.
Keep up with your garden journal. It’s easy to put it off during this busy season, but this is precisely the time to make entries while the insights are fresh in your mind. Take a few pictures, too.