Succession Planting: How to Harvest Continuously All Season

The Feast-or-Famine Problem

Every market gardener and small-scale farmer has experienced it: three weeks where you cannot give away lettuce fast enough, followed by six weeks where you have nothing to sell. Your customers find another vendor. Your cash flow becomes a series of spikes and valleys. Your cooler alternates between overflowing and empty.

This is the result of single-batch planting, and it is one of the most common and most avoidable problems in vegetable and herb production. Succession planting -- the practice of making multiple, staggered plantings of the same crop at calculated intervals -- transforms a chaotic harvest calendar into a predictable, continuous supply line.

This guide covers the timing techniques, crop-specific schedules, and planning tools you need to implement succession planting on any scale, from a quarter-acre market garden to a multi-hectare CSA operation.

The Core Principle: Days to Maturity Is Your Planning Unit

Every succession planting schedule starts with one number: days to maturity (DTM). This is the time from transplant (or direct seeding) to first harvest. It appears on every seed packet and in every seed catalog.

The harvest window -- the number of days a planting remains in productive harvest -- is equally important but less commonly listed. Together, these two numbers determine your planting interval.

The formula:

Planting Interval = Harvest Window

If a crop has a 7-day harvest window, you plant every 7 days to maintain continuous supply. If the harvest window is 21 days, you plant every 21 days.

In practice, you add a buffer of 2-3 days because weather, fertility, and variety differences create slight variations. But the principle holds: match your planting frequency to your harvest window.

Succession Planting Techniques

Technique 1: Same Variety, Staggered Dates

The simplest approach. Plant the same variety at regular intervals throughout the season.

Best for: Lettuce, salad greens, radishes, bush beans, cilantro, dill, basil.

Example -- Head lettuce:

• DTM: 55 days from transplant
• Harvest window: 7-10 days (after which heads bolt or become oversized)
• Planting interval: 7-10 days
• Number of successions for a 16-week season: 11-16 plantings

At 500 heads per planting on a 30-meter bed, this produces 5,500 to 8,000 heads across the season -- a steady 350-500 heads per week rather than 5,000 heads in one week and none for months.

Technique 2: Multiple Varieties, Same Planting Date

Use varieties with different maturity dates to stagger harvest from a single planting.

Best for: Tomatoes, peppers, sweet corn, cabbage, broccoli.

Example -- Sweet corn:

By planting all four varieties on the same date, you get corn from week 9 through week 15 -- seven weeks of harvest from one planting session. Combine this with a second planting of all four varieties three weeks later, and you extend the window to ten weeks with overlapping harvests.

Technique 3: Relay Planting

A new crop is planted into or immediately after a finishing crop, using the same bed space. This maximizes land use and is essential for small farms.

Best for: Following spring crops (peas, spinach, radish) with summer crops (beans, squash, cucumbers), then following summer crops with fall crops (kale, turnips, lettuce).

Example relay sequence for a single 30-meter bed:

• March 15: Direct seed spinach and radishes
• May 1: Harvest spinach and radishes complete. Transplant bush beans.
• July 15: Final bean harvest. Transplant fall lettuce and kale.
• September 1 to November: Harvest lettuce and kale.

Three crops from one bed in one season. Total revenue per bed can increase by 60-100% compared to a single crop cycle.

Technique 4: Overwintering Successions

In mild climates (USDA zones 7 and above, or tropical highlands), certain crops can be planted in late fall for very early spring harvest, filling the gap before spring-planted successions begin producing.

Crops that overwinter well:

• Garlic (planted October, harvested June)
• Overwintering onions (planted September, harvested May-June)
• Winter lettuce under low tunnels (planted October, harvested February-March)
• Fava beans (planted November, harvested April-May)
• Spinach (planted September, harvested November through March with protection)

Crop-Specific Succession Schedules

Quick-Turnover Crops (Plant Every 7-14 Days)

These crops have short harvest windows and bolt or decline rapidly. Continuous supply requires frequent planting.

Lettuce (head types):

• Planting interval: 7-10 days
• Plants per succession: Based on weekly sales target
• Season: Spring through fall; skip midsummer in hot climates or use heat-tolerant varieties (Muir, Concept, Sparx)
• Note: In tropical climates, lettuce grows year-round at elevations above 1,500 meters

Cilantro:

• Planting interval: 7-10 days (bolts extremely fast in heat)
• Use slow-bolt varieties (Calypso, Santo) in warm seasons
• Direct seed only; does not transplant well
• Succession frequency can drop to every 14 days in cool weather

Radishes:

• Planting interval: 7-10 days
• DTM: 22-30 days from direct seed
• Harvest window: 5-7 days before they become pithy
• One of the easiest crops to succession plant; also excellent for intercropping between slower crops

Arugula and salad mix:

• Planting interval: 10-14 days for baby leaf, 14-21 days for full size
• Can get 2-3 cuttings per planting if cut at baby leaf stage

Medium-Turnover Crops (Plant Every 14-28 Days)

Bush beans:

• Planting interval: 14-21 days
• DTM: 50-60 days from direct seed
• Harvest window: 10-14 days
• 3-5 successions per season covers a 12-16 week supply
• Do not start too early; beans germinate poorly in soil below 16 degrees Celsius

Cucumbers:

• Planting interval: 21-28 days
• DTM: 50-65 days from transplant
• Harvest window: 21-35 days (longer in warm climates)
• 2-3 successions are sufficient for most markets
• Later successions often suffer less from cucumber beetle pressure

Summer squash / zucchini:

• Planting interval: 21-28 days
• DTM: 45-55 days from transplant
• Harvest window: 28-42 days
• 2-3 successions cover the season
• Powdery mildew typically kills first planting just as second begins producing

Long-Season Crops (1-2 Plantings, Multiple Varieties)

Tomatoes:

• Use variety maturity staggering (Technique 2)
• Plant early-season (determinate, 60-70 DTM) and main-season (indeterminate, 75-85 DTM) varieties
• In tropical climates, a second full planting 8-10 weeks after the first extends production through the cooler season
• Single plants of indeterminate varieties can produce for 4-6 months in frost-free climates

Winter squash:

• Single planting; harvest window is effectively one day (when fully mature)
• Variety staggering helps: acorn squash matures at 80 days, butternut at 100 days, hubbard at 110 days
• Storage extends availability by 3-6 months

Brassicas (broccoli, cabbage, cauliflower):

• 2-3 planting dates: early spring, late spring, midsummer (for fall harvest)
• Each planting uses a single variety matched to the season
• Spring plantings need bolt-resistant varieties; fall plantings need cold-hardy types

Planning Your Succession Calendar

Step 1: Define Your Harvest Window

Work backward from your market. If you sell at a farmers market every Saturday from May through October, you need 26 weeks of continuous harvest. List every crop you want to offer each week.

Step 2: Calculate Successions Per Crop

For each crop, divide your total desired harvest weeks by the harvest window of one planting. Round up.

Example: You want bush beans for 14 weeks. Each planting produces for 12 days (roughly 2 weeks). You need 7 successions.

Step 3: Map Planting Dates Backward

From each desired harvest date, subtract the DTM to find the planting date. Adjust for seasonal variation: add 5-10 days for cool early-season conditions, subtract 3-5 days for peak summer heat.

Step 4: Create a Seeding Calendar

Consolidate all planting dates into a weekly seeding schedule. This becomes your master production plan. Each week, you know exactly what to seed in the greenhouse and what to direct-sow in the field.

A typical 1-acre market garden might have 8-12 seeding tasks per week during the peak season (April through July). This sounds like a lot, but each task is small -- a single tray of lettuce, a 15-meter bed of beans.

Step 5: Plan Bed Rotations

Map which bed each succession will occupy. This prevents double-booking beds and ensures proper crop rotation (no planting the same family in the same bed within a 3-year cycle).

A spreadsheet with beds as rows and weeks as columns is the simplest tool. Color-code by crop family. Gaps represent opportunities for cover crops or additional successions.

Adjustments for Tropical and Equatorial Climates

Succession planting in the tropics differs from temperate systems in several important ways:

No hard season boundaries. Without frost, the growing season is continuous. This simplifies some planning (no spring/fall transitions) but complicates others (pest and disease pressure never resets).

Temperature varies by altitude, not by date. At 0-800 meters, tropical lowland crops (tomatoes, peppers, cucumbers) produce year-round. At 1,500-2,500 meters, temperate crops (lettuce, broccoli, carrots) thrive year-round. Planning is driven by wet/dry season cycles rather than temperature.

Faster crop cycles. Higher average temperatures accelerate growth. Lettuce DTM drops from 55 to 40 days. Bush beans mature in 45 days instead of 60. Succession intervals compress accordingly.

Rain-driven pest cycles. In tropical systems, succession planting can be timed to avoid peak pest emergence. Planting beans just after the heaviest rains subside, for example, reduces bean fly damage because adult flight activity drops in drier conditions.

Common Succession Planting Mistakes

• Starting all successions on day one. If you plant your first succession of lettuce on March 1, your second on March 8, your third on March 15, and so on, you will not have lettuce until late April. Start your first succession based on when you want your first harvest, not when you feel like planting.

• Ignoring the midsummer gap. Many cool-season crops (lettuce, spinach, cilantro) cannot be succession-planted through midsummer in hot climates. Plan for this gap by switching to heat-tolerant alternatives or by using shade cloth to extend the window.

• Forgetting transplant production lead time. If a crop needs 4 weeks in the greenhouse before transplanting, you must seed your transplant trays 4 weeks before each field planting date. Put the greenhouse seeding dates on your calendar, not just the field dates.

• Under-sizing successions to avoid waste. It is better to have a slight surplus (which can be composted or donated) than to run short and lose a customer to another vendor. Size each succession to your maximum expected weekly demand, not your average.

• Not keeping records. The best succession schedules are refined over 3-5 seasons based on actual performance data. Record planting dates, first harvest dates, last harvest dates, and total yield for every succession. This data is worth more than any planning guide.

Succession planting transforms vegetable farming from a series of gambles into a manufacturing process. Each planting is a predictable production unit with a known input cost, a known lead time, and a known output. Stack enough of these units across the season, and you have a business that delivers consistent revenue every single week.