New Hampshire’s short growing season demands early soil preparation and strategic timing for successful beet harvests. Knowing the best time to plant beets in New Hampshire is the key to getting a sweet, tender crop before frost arrives. This guide covers everything you need, from soil temperature to succession planting.
Beets are a cool-season crop that thrives in spring and fall. In New Hampshire, you have two main windows for planting. The first is as soon as the soil can be worked in spring, and the second is in late summer for a fall harvest.
Best Time To Plant Beets In New Hampshire
The best time to plant beets in New Hampshire is from mid-April to early May for spring planting. For a fall crop, aim for late July to mid-August. These dates vary slightly depending on your specific location within the state.
Soil temperature is more important than the calendar date. Beets germinate best when soil temperatures reach 50°F (10°C) at a depth of 2 inches. Use a soil thermometer to check before planting.
Spring Planting Window
In southern New Hampshire, you can start planting in mid-April. In northern areas, wait until early May. The ground should be dry enough to crumble in your hand, not muddy.
- Southern NH: April 15 to May 1
- Central NH: April 20 to May 5
- Northern NH: May 1 to May 15
Beets can tolerate light frosts. If a hard freeze is forecast, cover your seedlings with row cover or old sheets. This protects them without harming growth.
Fall Planting Window
For a fall harvest, count back 8 to 10 weeks from your first expected frost date. In New Hampshire, first frost ranges from late September in the north to mid-October in the south.
- Northern NH: Plant by July 20
- Central NH: Plant by August 1
- Southern NH: Plant by August 10
Fall beets often taste sweeter because cooler temperatures concentrate sugars. They also store better in the ground after frost.
Understanding New Hampshire’s Growing Zones
New Hampshire spans USDA hardiness zones 3b to 5b. Northern areas have shorter, cooler summers. Southern areas have slightly longer seasons. This affects your planting calendar.
Zone 3B And 4A (Northern NH)
These zones have a frost-free period of only 90 to 110 days. You need to start beets as early as possible. Use black plastic mulch to warm the soil faster.
Plant spring beets in early May. For fall, plant by mid-July. Choose fast-maturing varieties like ‘Early Wonder’ or ‘Detroit Dark Red’ that mature in 50 to 55 days.
Zone 4B And 5A (Central And Southern NH)
These zones have 120 to 150 frost-free days. You have more flexibility. Plant spring beets from mid-April to early May. Fall planting can extend into early August.
Try varieties like ‘Bull’s Blood’ or ‘Chioggia’ for color and flavor. They mature in 55 to 60 days.
Soil Preparation For Beets
Beets need loose, well-drained soil with a pH between 6.0 and 7.0. Rocky or clay soil causes misshapen roots. Prepare your bed in fall or early spring.
- Remove rocks and debris from the top 8 inches of soil.
- Mix in 2 to 3 inches of aged compost or well-rotted manure.
- Test soil pH and add lime if needed to reach 6.5.
- Rake the bed smooth and level.
Beets are heavy feeders. Add a balanced fertilizer like 10-10-10 at planting time. Avoid high-nitrogen fertilizers, which cause leafy tops but small roots.
Improving Clay Soil
If your soil is heavy clay, grow beets in raised beds or containers. Mix in sand or peat moss to improve drainage. Beets need consistent moisture but not waterlogged soil.
For raised beds, use a mix of garden soil, compost, and perlite. This gives beets the loose texture they need to develop straight roots.
How To Plant Beet Seeds
Beet seeds are actually clusters of seeds. Each “seed” can produce 2 to 4 seedlings. Plant them 1/2 inch deep and 1 inch apart in rows spaced 12 to 18 inches apart.
After seedlings emerge, thin them to 3 to 4 inches apart. Use scissors to cut extras at soil level to avoid disturbing roots. Thinned seedlings are edible as microgreens.
Succession Planting
For a continuous harvest, plant new seeds every 2 to 3 weeks. Stop planting 6 weeks before your first fall frost. This ensures beets have time to mature.
- First planting: Mid-April
- Second planting: Early May
- Third planting: Late May
- Fall planting: Late July to early August
Succession planting works well in New Hampshire’s short season. You get fresh beets from June through October.
Watering And Care
Beets need consistent moisture, especially during germination and root development. Water 1 inch per week if rain is scarce. Use drip irrigation or soaker hoses to keep leaves dry.
Mulch around plants with straw or grass clippings. This conserves moisture, suppresses weeds, and keeps soil cool. In hot weather, mulch is essential for preventing woody beets.
Thinning And Weeding
Thin seedlings when they are 2 inches tall. Crowded beets produce small, misshapen roots. Keep the strongest seedling every 3 to 4 inches.
Weed regularly, but be gentle. Beets have shallow roots. Hand-pull weeds near the plants to avoid damage. A light hoeing between rows works well.
Common Pests And Diseases
Beets in New Hampshire face few serious problems. The main pests are leaf miners and flea beetles. Diseases include damping-off and Cercospora leaf spot.
Leaf Miners
Leaf miners create winding tunnels in leaves. Remove affected leaves promptly. Use row covers to prevent adult flies from laying eggs. Beneficial insects like parasitic wasps help control them.
Flea Beetles
Flea beetles make small holes in leaves. They are most active in spring. Use diatomaceous earth or neem oil as a natural deterrent. Row covers also work well.
Damping-Off
This fungal disease kills seedlings at soil level. Prevent it by planting in well-drained soil and avoiding overwatering. Use a fungicide seed treatment if you have had problems before.
Harvesting Beets
Beets are ready to harvest 50 to 70 days after planting, depending on variety. Harvest when roots are 1 to 3 inches in diameter. Larger beets can become tough and woody.
Pull beets gently by the tops. Twist off the greens, leaving 1 inch of stem. This prevents bleeding during storage. Greens are edible and nutritious.
Storing Fresh Beets
Store unwashed beets in a plastic bag in the refrigerator. They keep for 2 to 3 months at 32°F with high humidity. Remove greens before storing to extend shelf life.
For long-term storage, place beets in a root cellar or cold basement. Pack them in damp sand or sawdust. They stay fresh for 4 to 6 months.
Fall And Winter Harvest Tips
Beets can survive light frosts. In fact, frost improves their sweetness. Cover plants with straw or row covers if temperatures drop below 28°F.
In southern New Hampshire, you can harvest beets into November. In northern areas, harvest by mid-October. Dig them before the ground freezes solid.
Overwintering Beets
In mild winters, you can leave beets in the ground. Mulch heavily with 6 inches of straw or leaves. Harvest as needed through winter. This works best in zones 5a and warmer.
In colder zones, beets are unlikely to survive. Dig and store them indoors instead.
Best Beet Varieties For New Hampshire
Choose varieties that mature quickly and tolerate cool weather. Here are top picks for New Hampshire gardens.
- ‘Detroit Dark Red’: Classic red beet, 55 days to maturity
- ‘Early Wonder’: Fast maturing, 50 days, good for spring
- ‘Bull’s Blood’: Deep red leaves and roots, 55 days
- ‘Chioggia’: Candy-striped interior, 55 days
- ‘Golden’: Yellow roots, mild flavor, 55 days
- ‘Cylindra’: Long, cylindrical roots, 60 days
All these varieties perform well in New Hampshire’s climate. Try a mix for color and variety.
Frequently Asked Questions
Can I Plant Beets In New Hampshire In July?
Yes, you can plant beets in July for a fall harvest. In northern NH, plant by mid-July. In southern NH, you can plant until early August. Choose fast-maturing varieties to ensure they ripen before frost.
How Late Can I Plant Beets In New Hampshire?
The latest planting date for beets in New Hampshire is mid-August in southern areas. In northern areas, stop planting by late July. Beets need 50 to 60 days of growing time before the first hard frost.
Do Beets Need Full Sun In New Hampshire?
Beets grow best in full sun, meaning at least 6 hours of direct sunlight daily. They can tolerate partial shade, but roots will be smaller. In New Hampshire’s short season, full sun helps maximize growth.
Should I Soak Beet Seeds Before Planting?
Soaking beet seeds in water for 12 to 24 hours can speed up germination. It softens the seed coat. This is helpful in cool spring soil. Drain and plant immediately after soaking.
Can I Grow Beets In Containers In New Hampshire?
Yes, beets grow well in containers. Use a pot at least 12 inches deep with drainage holes. Fill with loose potting soil. Water regularly and fertilize every 2 weeks. Place in a sunny spot.
Final Tips For Success
Start your soil preparation early. New Hampshire’s spring can be wet and cold. Raised beds warm up faster than ground soil. Use a soil thermometer to check conditions.
Plant in succession for a steady supply. Beets are one of the easiest crops for beginners. With the right timing, you will enjoy fresh beets from early summer through late fall.
Dont forget to rotate your beet patch each year. Avoid planting where other root crops grew recently. This reduces disease pressure and keeps soil healthy.
Harvest beets at the right size. Small beets are more tender. Large beets can be tough. Taste test a few to find your prefered size.
With these guidelines, you now know the best time to plant beets in New Hampshire. Get your soil ready, choose your varieties, and enjoy a bountiful harvest.