Essential Steps for Planting Sweet Peas in April for Summer Blooms

Sweet peas, known for their vibrant pink, blue, and purple colors, along with their delightful fragrance, are favorites among gardeners. However, they do need some attention during this time of year.

Many gardeners begin sweet pea seeds indoors in the fall to promote stronger root systems. By April, there are several tasks to tackle, including pinching seedlings for better blooms, acclimating them to outdoor conditions, and transplanting them. It's also important to set up climbing supports, like this metal obelisk from Wayfair.

Growing sweet peas can be very rewarding, especially when their blooms appear as spring gives way to summer. Knowing how to care for them in April will maximize your enjoyment.

Pinch Your Sweet Peas

Sweet pea seeds from Burpee are typically sown indoors in fall for an earlier and stronger start. By this month, they should be ready for pinching (if you haven't done that yet).

When your sweet peas reach a height of 5-8 inches, it's time to pinch them back to encourage bushier plants and more fragrant flowers. Using your fingers or a pair of pruning snips from Amazon will do the trick once they have 2-3 pairs of true leaves.

Deadheading sweet peas will promote additional blooms once flowering begins, but for now, pinching is the best preparation step.

Acclimate Your Seedlings

To help your seedlings adjust to outdoor life, they need to be hardened off. This involves gradually moving them outside and protecting them from harsh conditions, particularly at night.

It's recommended to harden off your seedlings over a week or two, placing them outside on pleasant days and bringing them back in at night. A cold frame can simplify this process; just open it during the day and close it at night.

You can find a compact metal cold frame from IKEA or a wooden cold frame from Amazon.

Transplant Your Seedlings

Transplanting sweet pea seedlings into outdoor soil

Once your seedlings are hardened off, it's time to transplant them outdoors.

Sweet peas thrive in mild temperatures, so they will do best in the mid-spring weather. This month, you can move any seedlings you've grown or purchased from the nursery.

Before transplanting, ensure the soil temperature is at least 60°F. Young sweet peas are hardy, but they won't flourish in cold soil.

Using a soil tester from Walmart can help you check soil conditions.

This is also a good time to enhance your garden soil. A layer of organic compost and thorough watering are beneficial when planting sweet peas.

Set Up Climbing Supports

flowering sweet peas growing up structure

Experts suggest not planting sweet peas in overly sunny or shady spots and always providing support for their growth.

Place sweet peas in a sunny area and set up climbing supports, like trellises, obelisks, or canes, at planting time. Adding supports later can disturb the roots.

For a budget-friendly option, consider bamboo stakes from Amazon. Alternatively, a wood trellis from IKEA can add visual appeal to your garden.

Use garden twine from Amazon to tie the sweet pea stems to the support as they grow for stronger, upright growth.

For an impressive display, try creating a sweet pea teepee with your seedlings.