When to Plant Cosmos in Massachusetts
State
Massachusetts
Cities Covered
27
USDA Zones
6a, 6b, 7a
Plant Type
Direct Sow
📅 Planting Calendar for Massachusetts
Based on Boston (Zone 7a). Dates may vary by city.
Direct Sow Outdoors Friday, April 10, 2026
Note: Massachusetts spans multiple zones (6a, 6b, 7a). Select your city below for more precise dates.
🌿 Plant Details
Scientific Name Cosmos bipinnatus
Days to Maturity 60 days
Sun Requirements Full Sun (6-8 hours)
Plant Spacing 18" apart
Find Your City in Massachusetts
Allston (Zone 6b)
Andover (Zone 6b)
Boston (Zone 7a)
Braintree (Zone 6b)
Brighton (Zone 6b)
Cambridge (Zone 6b)
Charlestown (Zone 7a)
Chelsea (Zone 7a)
Everett (Zone 7a)
Hyde Park (Zone 6b)
Jamaica Plain (Zone 6b)
Malden (Zone 6b)
Mattapan (Zone 6b)
Medford (Zone 6b)
Melrose (Zone 6b)
Milton (Zone 6b)
Milton Village (Zone 6b)
Quincy (Zone 6b)
Readville (Zone 6b)
Revere (Zone 7a)
Roslindale (Zone 6b)
Somerville (Zone 7a)
Stoneham (Zone 6b)
West Medford (Zone 6b)
West Roxbury (Zone 6b)
Weymouth (Zone 6b)
Winthrop (Zone 7a)
Other Plants for Massachusetts
Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Parsley Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussels Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Cayenne Pepper Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Fennel Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Potato Pumpkin Radicchio Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Squash Sweet Corn Sweet Potato Swiss Chard Tomato Turnip Watermelon Zucchini Sunflower Marigold Zinnia Nasturtium Echinacea (Coneflower) Petunia Black-eyed Susan Apple Tree Pear Tree Peach Tree Plum Tree Sweet Cherry Tree Lemon Tree Borage Lemongrass Ginger Stevia Tomatillo Edamame Fava Bean Mâche Mizuna Sorrel Shishito Pepper Banana Pepper Watermelon Radish Napa Cabbage Popcorn Broccoli Raab Catnip Valerian Lemon Verbena Bee Balm Anise Lovage Chervil Summer Savory Dahlia Snapdragon Pansy Sweet Pea Morning Glory Hollyhock Larkspur Bachelor Button Columbine Impatiens Salvia (Annual) Sweet Alyssum Celosia Lupine Verbena Elderberry Grape Vine Red Currant Gooseberry Serviceberry Fig Tree Avocado Tree Persimmon Tree Olive Tree
Browse Other States
Growing Cosmos in Massachusetts
Cosmos (Cosmos bipinnatus) is a popular garden vegetable in Massachusetts. The state spans USDA Hardiness Zones 6a, 6b, 7a, so planting dates can vary significantly depending on your location.
In most areas of Massachusetts, you can direct sow Cosmos outdoors around Friday, April 10, 2026.
For the most accurate planting dates, enter your ZIP code on our homepage or select your city from the list above.