What to plant this week in Hartford, CT
With average last frost now set for April 21, Hartford gardeners are in the critical window to harden off heat-loving starts and plant warm-season crops like summer squash and okra. This week marks the transition from late spring cleanup to aggressive growth as soil temperatures finally climb past the barrier for beans and corn.
The next 7 days
Hartford, CTGrowing in Hartford right now
- Hartford's clay-heavy glacial soils often stay cold longer than the air; till in compost immediately around transplants to improve drainage and warm the root zone faster.
- Be vigilant with row covers this week, as late April snaps can still occur after the average last frost date of April 21, threatening young tender crops like basil and edamame.
- Take advantage of the upcoming harvest window for bush beans and zucchini, which thrive in our humid microclimates if planted now or early next week.
- Watch local rainfall patterns closely; Hartford can see heavy spring downpours that wash away nitrogen fertilizers applied just before planting.
Sow this week
No direct sowing windows open this week.
Transplant this week
Nothing is due to go out this week.
Harvest soon
45 crops- Basil
- Borage
- Bush Bean
- Cantaloupe
- Celery
- Cleome (Spider Flower)
- Cosmos
- Cowpea (Black-Eyed Pea)
- Cucumber
- Dahlia
- Edamame
- Fennel
- Flour Corn
- French Marigold
- Garden Verbena
- Garlic
- Ghost Pepper (Bhut Jolokia)
- Gourd (Ornamental/Bottle)
- Honeydew Melon
- Leek
- Lima Bean
- Lisianthus (Prairie Gentian)
- Loofah (Luffa)
- Malabar Spinach
- Nasturtium
- Okra
- Ornamental Sweet Potato Vine
- Parsnip
- Pole Bean
- Potato
- Pumpkin
- Roselle (Cranberry Hibiscus)
- Scarlet Runner Bean
- Shiso (Japanese Basil)
- Summer Savory
- Sunflower
- Sweet Corn
- Sweet Potato
- Thai Basil
- Vinca (Madagascar Periwinkle)
- Watermelon
- Winter Squash
- Yellow Summer Squash
- Zinnia
- Zucchini
Seasonal tips
- Keep a close eye on pollinator-friendly flowers like Cosmos and Zinnia to ensure good seed set.
- Harvest bush beans and cucumbers frequently to encourage continued production throughout summer.
- Protect young transplants from late spring chill with row covers if an unexpected cold snap occurs.
- Plan succession sowing for cool-season crops now so they are ready as the weather cools in October.
Pest & disease watch
- Spider mites are becoming active on the undersides of fennel and parsley as humidity levels fluctuate, requiring weekly hose-down inspections.
- Cucumber beetles will aggressively target your newly planted cucumbers and melons this week; apply organic insecticidal soap at dawn before they hide under leaves.
- Late-blooming weeds like wild garlic are common in our clay cracks now; pull them immediately to prevent them from competing with young transplants.
Watering this week
Water deeply in the morning to reduce evaporation and prevent fungal issues on leafy greens.
Save seeds from your best-performing varieties like French Marigold and Zinnia to start your next season's garden early.
Hartford gardening questions
3Can I plant my garlic bulbs now if the soil looks wet?
No, wait for the ground to dry slightly after recent rains; planting garlic into saturated Hartford clay can cause rot before roots establish. If it's too wet, mulch bare spots lightly and check daily.
My zucchini leaves are developing small holes—what is eating them?
This is likely cucumber beetles or flea beetles, which are currently active on summer squash in our region. Hand-pick large beetles and spray the undersides of leaves with a neem oil mixture immediately.
How do I extend the season for my pole beans past early October?
Since our first frost averages around October 24, plant now or next week to get a mid-summer crop before the freeze. For a fall harvest, consider planting a second round of cool-season crops like parsnips in late August.
Other cities in zone 6b
12See the full zone 6b guide → · Plan your Hartford garden in SproutGuide →