What to plant in March marks the exciting transition from winter dormancy to active spring gardening, offering opportunities to start cold-hardy crops that thrive in cool weather while preparing the foundation for a productive growing season. This pivotal month allows gardeners to take advantage of moderating temperatures and increasing daylight to establish vegetables, herbs, and flowers that prefer cool conditions and actually benefit from light frosts. From peas and lettuce that germinate in cold soil to hardy perennials that establish strong root systems, March planting sets the stage for continuous harvests and beautiful displays throughout the growing season.

What Are the Best Plants to Start in March?

The best plants to start in March include cold-hardy vegetables like peas, lettuce, and spinach ($2-5 per packet), brassicas such as broccoli and cabbage ($3-8 per packet), hardy herbs like cilantro and chives ($2-4 per packet), and early flowers like pansies and sweet peas ($3-8 per packet). Focus on varieties that tolerate frost and prefer cool soil temperatures for optimal germination and growth.

Cold-Hardy Vegetables for March

Peas and Legumes

Nitrogen-fixing crops that improve soil:

Garden Peas

Shelling peas: Traditional garden varieties
Sugar snap peas: Edible pods, sweet flavor
Snow peas: Flat pods for stir-fry
Dwarf varieties: Compact plants for small spaces

Planting Tips

Soil temperature: Plant when soil reaches 40°F
Depth: 1-2 inches deep in cool soil
Spacing: 2-4 inches apart in rows
Support: Provide trellises for climbing varieties
Cost: $3-6 per pea seed packet, 50-100 seeds

Fava Beans

Broad beans: Cold-hardy protein source
Windsor varieties: Large, flavorful beans
Aquadulce: Extra hardy variety
Nitrogen fixation: Improves soil fertility

Leafy Greens

Cool-season crops that bolt in heat:

Lettuce

Butterhead: Soft, sweet leaves
Romaine: Crisp, upright growth
Leaf lettuce: Quick-growing loose leaves
Mesclun mixes: Variety of baby greens

Spinach

Baby spinach: Tender leaves for salads
Mature spinach: Cooking varieties
Bolt-resistant: Slow to flower varieties
Succession planting: Sow every 2-3 weeks
Cost: $2-4 per seed packet, 100-500 seeds

Asian Greens

Bok choy: Mild, versatile vegetable
Mizuna: Feathery, mild mustard green
Tatsoi: Rosette-forming, cold-hardy
Mustard greens: Spicy, nutritious leaves

Design your March garden with GardenUp's spring planting tools. Plan cold-hardy crops and succession plantings for continuous spring harvests.

Brassica Family Crops

Cole Crops

Vegetables that improve with cool weather:

Broccoli

Transplants: Started indoors 6-8 weeks earlier
Direct seeding: Plant in prepared beds
Varieties: Choose appropriate for spring harvest
Spacing: 12-18 inches apart for full heads

Cabbage

Early varieties: Quick-maturing for spring
Storage types: Dense heads for keeping
Red cabbage: Colorful, nutritious variety
Transplant timing: Set out after hardening off

Cauliflower

White varieties: Classic cauliflower
Colored types: Purple, orange, green varieties
Self-blanching: Varieties that cover heads
Temperature sensitive: Requires steady cool weather
Cost: $3-8 per seed packet or $2-4 per transplant

Radishes and Turnips

Quick-growing root vegetables:

Radishes

Cherry Belle: Classic red radishes, 25-30 days
French Breakfast: Mild, elongated variety
Daikon: Large white radishes
Black Spanish: Storage radish variety

Turnips

Purple Top: Classic storage turnip
Hakurei: Sweet, tender salad turnip
Turnip greens: Nutritious leaves
Quick harvest: Baby turnips in 45 days

Hardy Herbs for March

Perennial Herbs

Establish long-term herb gardens:

Chives

Common chives: Onion-flavored leaves
Garlic chives: Flat leaves, garlic flavor
Perennial nature: Returns year after year
Flowers: Edible purple blooms

Oregano

Greek oregano: Intense flavor variety
Common oregano: Milder culinary type
Perennial establishment: Plant for future years
Drought tolerance: Low maintenance once established
Cost: $2-5 per herb seed packet or $4-8 per plant

Thyme

Common thyme: Classic culinary variety
Lemon thyme: Citrus-flavored variety
Creeping thyme: Groundcover variety
Perennial benefits: Long-term garden addition

Annual Herbs

Quick-growing herbs for immediate use:

Cilantro

Slow-bolt varieties: Heat-tolerant selections
Succession planting: Continuous harvest
Cool preference: Better in spring than summer
Dual use: Leaves and seeds (coriander)

Dill

Fernleaf dill: Compact variety
Mammoth dill: Large seed heads
Companion benefits: Attracts beneficial insects
Pickle production: Essential for homemade pickles

Parsley

Flat-leaf: Italian variety with strong flavor
Curly parsley: Decorative and functional
Biennial nature: Overwinters in mild climates
Vitamin content: High in vitamins A and C

Early Spring Flowers

Cool-Season Annuals

Flowers that thrive in cool weather:

Pansies

Cool-season blooms: Flowers in cool weather
Color variety: Wide range of colors
Edible flowers: Safe for salads
Frost tolerance: Survive light frosts

Sweet Peas

Fragrant climbers: Scented flowers
Cool preference: Best in spring weather
Support needed: Provide trellises or stakes
Cut flowers: Excellent for arrangements
Cost: $3-8 per flower seed packet

Calendula

Pot marigold: Bright orange and yellow
Edible flowers: Petals for salads
Medicinal uses: Traditional healing properties
Self-seeding: May return next year

Hardy Perennials

Establish for long-term beauty:

Primrose

Early blooms: First flowers of spring
Shade tolerance: Performs well in partial shade
Perennial nature: Returns annually
Color variety: Many colors available

Violets

Native varieties: Support local wildlife
Groundcover: Spreads naturally
Edible flowers: Leaves and flowers edible
Shade adaptation: Thrives in woodland settings

Soil Preparation for March

Spring Soil Conditioning

Prepare beds for early planting:

Soil Testing

pH levels: Test and adjust as needed
Nutrient content: Determine fertilizer needs
Organic matter: Add compost and amendments
Drainage: Improve if necessary

Bed Preparation

Gentle cultivation: Avoid working wet soil
Organic matter: Add compost and aged manure
Raised beds: Improve drainage and warming
Mulching: Prepare for weed suppression
Cost: $15-50 per 100 square feet for soil amendments

Cold Protection

Protect early plantings from late frosts:

Row Covers

Floating fabric: Lightweight protection
Hoops: Support for covers
Ventilation: Remove during warm days
Gradual removal: Harden plants gradually

Cold Frames

Permanent structures: Year-round use
Ventilation: Automatic or manual
Thermal mass: Water jugs for heat storage
Season extension: Earlier and later harvests

Regional Planting Considerations

Northern Zones (3-6)

Cold climate March planting:

Timing Adjustments

Soil temperature: Wait for soil to thaw
Frost dates: Plant after last hard frost
Microclimates: Use protected areas
Season extension: Cold frames and row covers

Recommended Crops

Peas: Extremely cold-hardy
Lettuce: Handles light frosts
Spinach: Survives hard frosts
Radishes: Quick-growing, cold-tolerant
Cost: $30-80 for northern zone March plantings

Southern Zones (7-10)

Warm climate considerations:

Heat Avoidance

Early planting: Before hot weather
Variety selection: Heat-tolerant varieties
Succession planting: Multiple sowings
Shade protection: Partial shade in hot areas

Extended Season

Continuous planting: March through fall
Heat-tolerant varieties: Adapted selections
Summer preparation: Plan for hot weather
Fall garden: Start preparing for autumn

Coastal Areas

Maritime climate adaptations:

Mild Conditions

Extended season: Longer growing periods
Salt tolerance: Choose appropriate varieties
Wind protection: Shelter from ocean breezes
Consistent temperatures: More stable growing

Suitable Crops

Brassicas: Excel in cool, moist conditions
Leafy greens: Thrive in mild weather
Herbs: Mediterranean varieties
Flowers: Cool-season annuals

Succession Planting Strategies

Continuous Harvest

Extend harvest periods with strategic timing:

Lettuce

Weekly sowings: Continuous fresh salads
Variety mixing: Different textures and flavors
Heat management: Shade cloth for later plantings
Cut-and-come-again: Multiple harvests per plant

Radishes

2-week intervals: Avoid all maturing at once
Variety selection: Different sizes and colors
Companion planting: Interplant with slow crops
Storage planning: Preserve excess harvest
Cost: $20-50 for succession planting supplies

Season Extension

Maximize spring growing:

Staggered Varieties

Early varieties: Quick-maturing types
Mid-season: Standard varieties
Late varieties: Slow-bolting types
Heat-tolerant: Transition to summer

Protection Methods

Row covers: Frost protection
Cold frames: Controlled environment
Microclimates: Warm, protected areas
Timing: Adjust planting dates

Companion Planting

Beneficial Combinations

Plants that help each other:

Peas and Lettuce

Nitrogen fixation: Peas benefit lettuce
Space efficiency: Lettuce fills between peas
Harvest timing: Lettuce ready before peas climb
Cool preferences: Both prefer cool weather

Radishes and Spinach

Quick harvest: Radishes ready first
Soil breaking: Radishes loosen soil
Pest deterrent: Radishes repel some pests
Space efficient: Maximize bed utilization
Cost: $10-25 for companion planting combinations

Trap Crops

Plants that protect main crops:

Nasturtiums

Aphid attraction: Draws aphids away
Cucumber beetle: Attracts and traps
Edible flowers: Bonus harvest
Soil improvement: Living mulch

Marigolds

Nematode control: Root secretions
Pest deterrent: Strong scent
Beneficial insects: Attracts predators
Long blooming: Season-long benefits

Pest and Disease Management

Early Season Challenges

Common March garden issues:

Slug and Snail Control

Habitat modification: Remove hiding places
Barriers: Copper strips, diatomaceous earth
Traps: Beer traps and boards
Natural predators: Encourage beneficial insects

Aphid Management

Beneficial insects: Lady beetles, lacewings
Soap sprays: Gentle pest control
Companion planting: Pest-deterrent plants
Monitoring: Regular inspection for early control
Cost: $15-35 for organic pest control supplies

Disease Prevention

Prevent problems before they start:

Fungal Diseases

Air circulation: Proper plant spacing
Avoid overhead watering: Keep foliage dry
Soil drainage: Prevent waterlogged conditions
Sanitation: Remove diseased plant material

Viral Diseases

Insect control: Manage disease vectors
Resistant varieties: Choose disease-resistant types
Sanitation: Clean tools and hands
Isolation: Separate infected plants

Seed Starting Techniques

Indoor Seed Starting

Get a head start on the season:

Equipment Needed

Seed trays: Individual cells preferred
Growing medium: Seed-starting mix
Lighting: Fluorescent or LED grow lights
Heat mats: Maintain optimal temperature

Timing

Count back: Days to maturity plus hardening
Frost dates: Last expected frost
Transplant timing: Optimal outdoor conditions
Hardening off: Gradual acclimatization
Cost: $25-75 for seed starting supplies

Direct Seeding

Plant directly in garden beds:

Soil Preparation

Fine seedbed: Smooth, level surface
Soil temperature: Appropriate for each crop
Moisture: Consistent until germination
Depth: Follow seed packet instructions

Planting Techniques

Row planting: Straight lines for easy cultivation
Broadcasting: Scattered seeding for some crops
Succession: Multiple plantings for continuous harvest
Thinning: Remove excess seedlings

Harvesting Early Crops

Timing and Techniques

Optimize harvest quality:

Harvest Indicators

Size: Appropriate for variety
Color: Proper color development
Texture: Firm, crisp quality
Timing: Early morning for best quality

Harvesting Methods

Cut-and-come-again: Lettuce, spinach
Selective picking: Peas, radishes
Whole plant: Some crops harvested once
Succession: Continuous supply
Cost: $10-25 for harvesting tools

Post-Harvest Handling

Maintain quality after harvest:

Immediate Care

Cool quickly: Reduce field heat
Clean gently: Remove soil and debris
Sort: Separate damaged from good
Store properly: Appropriate conditions

Storage Methods

Refrigeration: Short-term storage
Hydro-cooling: Rapid temperature reduction
Humidity control: Prevent wilting
Ventilation: Air circulation

Transform Your March Garden Into Spring Success

March planting transforms the end of winter into the beginning of a productive growing season, proving that early spring offers unique opportunities for establishing crops that thrive in cool conditions while preparing for continuous harvests throughout the year. This strategic approach to early season gardening maximizes the cool-weather preferences of many crops while building momentum for full-season productivity.

Ready to start your spring garden? Use GardenUp's spring planting tools to create a customized March planting schedule that maximizes cool-season opportunities while preparing for season-long garden success.

Frequently Asked Questions

Is March too early to plant vegetables?

Not for cold-hardy crops! Peas, lettuce, spinach, and radishes actually prefer cool weather and can be planted as soon as soil can be worked. Use row covers for protection if needed.

What vegetables can I plant in March?

Plant cold-hardy vegetables like peas, lettuce, spinach, radishes, and brassicas (broccoli, cabbage, cauliflower). These crops thrive in cool weather and tolerate light frosts.

Should I wait until after the last frost to plant?

Cold-hardy crops can be planted 2-4 weeks before the last frost date. Tender plants like tomatoes and peppers should wait until after the last frost.

How do I know if soil is ready for planting?

Test soil by squeezing a handful. If it crumbles apart rather than forming a mud ball, it's ready. Soil temperature should be at least 40°F for most cool-season crops.

Can I plant flowers in March?

Yes! Cool-season flowers like pansies, sweet peas, and calendula thrive in March weather. They prefer cool temperatures and may struggle in summer heat.

What herbs can I plant in March?

Plant hardy herbs like chives, oregano, thyme, cilantro, dill, and parsley. These herbs prefer cool weather and establish well in spring conditions.

Create Your Perfect Spring Garden

March planting opens the door to a productive growing season filled with fresh vegetables, fragrant herbs, and beautiful flowers that make the most of cool spring weather. These early plantings often outperform later sowings while providing the foundation for continuous harvests and beautiful gardens throughout the growing season.

Start your March garden today and discover how early spring planting can provide fresh, flavorful harvests while establishing the foundation for a productive and beautiful garden that thrives from spring through fall.