What to plant this week in Hartford, CT
With Hartford's last frost historically around April 21 and current temps hovering near the -5°F winter minimum, many gardeners are now in late spring or early summer where late-harvest crops like rutabagas and parsnips need protection while heat-loving sows like okra and cucumber take off. This week marks a critical transition for Connecticut soils as you shift from hardening off cool-season transplants to aggressively starting warm-weather varieties that thrive after the mid-April chill.
The next 7 days
Hartford, CTGrowing in Hartford right now
- Hartford's clay-heavy river valley soil retains moisture well but drains poorly in low spots, so ensure raised beds have extra drainage holes or amend with compost to prevent waterlogging during our heavy spring rains.
- While the zone 6b average suggests a frost-free window until late October, microclimates along the Connecticut River often freeze later; use row covers on harvests like beets and carrots if an early fall cold snap is forecasted before Oct 24.
- Native soil pH in Hartford tends to be acidic; test your beds now before adding the nitrogen-heavy compost needed for this week's bush beans and cucumbers, as they struggle in compacted, unamended clay.
- Late-sown okra and Malabar spinach need consistent warmth that our cool Connecticut springs sometimes delay; mulch heavily around established plants to keep soil temperatures rising above 65°F.
Sow this week
17 crops- Basil
- Borage
- Bush Bean
- Cleome (Spider Flower)
- Cucumber
- French Marigold
- Malabar Spinach
- Nasturtium
- Okra
- Pole Bean
- Scarlet Runner Bean
- Summer Savory
- Thai Basil
- Vinca (Madagascar Periwinkle)
- Yellow Summer Squash
- Zinnia
- Zucchini
Transplant this week
Nothing is due to go out this week.
Harvest soon
58 crops- Anaheim (New Mexico) Pepper
- Banana Pepper
- Basil
- Beefsteak Tomato
- Beet
- Bell Pepper
- Borage
- Brussels Sprouts
- Bush Bean
- Cantaloupe
- Carrot
- Cayenne Pepper
- Cleome (Spider Flower)
- Cosmos
- Cowpea (Black-Eyed Pea)
- Cucumber
- Dahlia
- Edamame
- Eggplant
- Fennel
- Flour Corn
- French Marigold
- Garden Geranium (Zonal)
- Garden Verbena
- Garlic
- Honeydew Melon
- Jalapeño
- Lantana
- Lima Bean
- Malabar Spinach
- Marconi Pepper
- Nasturtium
- Okra
- Ornamental Sweet Potato Vine
- Parsley
- Parsnip
- Petunia
- Poblano Pepper
- Pole Bean
- Potato
- Roma Tomato
- Rutabaga
- Scallion (Bunching Onion)
- Scarlet Runner Bean
- Serrano Pepper
- Shiso (Japanese Basil)
- Snapdragon
- Summer Savory
- Sunflower
- Sweet Corn
- Thai Basil
- Tomatillo
- Tomato
- Vinca (Madagascar Periwinkle)
- Watermelon
- Yellow Summer Squash
- Zinnia
- Zucchini
Seasonal tips
- Succession sow bush beans and pole beans every two weeks for a continuous harvest throughout the summer.
- Mulch around young tomato and pepper plants to retain soil moisture as temperatures rise above 80°F.
- Thin carrot and beet seedlings now to prevent overcrowding and ensure sturdy root development.
Pest & disease watch
- Aphids are exploding on the new growth of this week's sowing list, particularly on basil, zinnias, and French marigolds as they emerge from cool spring air.
- Late-blooming squash like yellow summer squash and zucchini are prime targets for squash vine borers right now; inspect stems weekly for sawdust-like frass or wilting leaves.
- Cutworms frequently attack the base of transplanted tomatoes and peppers in Hartford's vegetable patches, so collar the stem of seedlings with cardboard tubes at night.
Watering this week
Water deeply in the early morning to encourage deep root growth and reduce evaporation losses during this hot season.
Harvest sweet corn when the kernels are milky and firm, not yet hard or fully browned, for peak sweetness.
Hartford gardening questions
3Can I still plant okra and Malabar spinach this week in Hartford?
Yes, these warm-season crops listed for sowing now will thrive once our soil warms past 65°F, though be prepared to delay emergence if a late April cold snap hits before the average April 21 date.
What should I do about my rutabagas and parsnips that are ready soon?
Since these are in your harvest-soon list but Hartford's first frost isn't until October 24, you can leave them in the ground with a thick layer of straw mulch to protect roots from early night frosts.
My basil plants have yellow leaves and stunted growth; is this normal for Hartford gardens?
This often indicates soil compaction or nitrogen deficiency common in our clay soils, so side-dress your basil with compost tea and ensure the drainage holes in your pots aren't clogged.
Other cities in zone 6b
12See the full zone 6b guide → · Plan your Hartford garden in SproutGuide →