How Long Does It Take to Grow Microgreens by Variety: Complete Timeline Guide

Quick answer: Microgreens grow at vastly different rates, with fast varieties like radish and cress ready in just 5-8 days, while slower varieties can take up to 16 days to reach harvest. You can expect most microgreens to be ready between 7-14 days from planting, with timing depending on the specific variety and your desired flavor intensity. Planning successive plantings based on these timelines ensures you'll have a continuous supply of fresh microgreens.

Growing microgreens is one of the most rewarding ways to get fresh, nutritious greens on your table quickly. But timing is everything when it comes to harvesting these tiny powerhouses at their peak flavor and nutrition.

Different microgreen varieties have vastly different growing timelines, ranging from lightning-fast 5-day crops to more patient 16-day varieties. Understanding these timelines helps you plan successive plantings, manage multiple varieties, and ensure you're harvesting at the optimal moment for maximum flavor and nutrition.

Fast-Growing Microgreens (5-8 Days)

Radish Microgreens: 5-7 Days

Radish microgreens are the speed demons of the microgreen world. These spicy little gems are typically ready for harvest in just 5-7 days from seed to plate.

The cotyledons (seed leaves) emerge around day 3, and by day 5, they're already developing their characteristic peppery bite. For maximum spice, harvest on day 6-7 when the leaves are fully opened but before the first true leaves appear.

Common radish varieties like Cherry Belle and Daikon follow this timeline closely, though Daikon tends to be slightly milder and may benefit from an extra day of growth.

Cress Microgreens: 6-8 Days

Watercress and garden cress are nearly as speedy as radishes. These peppery microgreens germinate quickly and develop their distinctive tangy flavor by day 6.

Cress microgreens have a unique growing pattern - they tend to grow in dense, carpet-like mats that are perfect for cutting with scissors. Harvest when the cotyledons are fully expanded and bright green, usually around day 7-8.

Mustard Microgreens: 6-8 Days

Mustard microgreens bring serious heat in a short timeframe. Red Giant and Mizuna varieties are typically ready in 6-8 days.

These microgreens develop their spicy kick early, so if you prefer milder flavors, harvest closer to day 6. For those who love bold, wasabi-like heat, let them go the full 8 days.

Medium-Growing Microgreens (8-12 Days)

Broccoli Microgreens: 8-10 Days

Broccoli microgreens are among the most popular varieties, and for good reason. These nutritional powerhouses are ready in 8-10 days and pack incredible health benefits.

Germination typically occurs within 2-3 days, with cotyledons emerging by day 4-5. The optimal harvest window is day 8-10, when the cotyledons are fully developed but before the first true leaves become prominent.

Broccoli microgreens have a mild, slightly sweet flavor with just a hint of that classic broccoli taste. They're perfect for beginners and experienced growers alike.

Kale Microgreens: 8-12 Days

Kale microgreens take a bit longer than their cruciferous cousin broccoli, typically requiring 8-12 days for optimal harvest. The timeline can vary significantly based on the specific kale variety.

Curly kale varieties tend to be ready closer to day 8-10, while Red Russian and Lacinato (dinosaur) kale may need the full 12 days. The cotyledons should be well-developed and the stems sturdy before harvesting.

These microgreens offer the nutritional benefits of full-grown kale in a more tender, milder package.

Arugula Microgreens: 9-12 Days

Arugula microgreens develop their signature peppery flavor gradually over 9-12 days. Early harvest at day 9 yields milder greens, while waiting until day 12 produces more intense, spicy flavors.

These microgreens have distinctive lobed cotyledons that make them easily recognizable. They're perfect for adding a peppery kick to salads and sandwiches.

Cabbage Microgreens: 9-12 Days

Red and green cabbage microgreens follow a similar 9-12 day timeline. Red cabbage varieties often take slightly longer but reward patience with stunning purple and red coloration.

The flavor is mild and slightly sweet, making cabbage microgreens excellent for those new to growing or eating microgreens. They're also visually striking, especially the red varieties.

Slower-Growing Microgreens (12-16 Days)

Pea Shoot Microgreens: 12-14 Days

Pea shoots are technically different from traditional microgreens since you're growing them for their shoots and tendrils rather than just cotyledons. This longer growing period results in a more substantial, crunchy texture.

These sweet, fresh-tasting greens are worth the wait. Harvest when the shoots are 3-4 inches tall with well-developed leaves and tendrils. The flavor is unmistakably sweet pea, making them a favorite for both chefs and home growers.

At Wind River Greens, pea shoots are consistently one of our most popular varieties due to their incredible flavor and substantial texture.

Sunflower Microgreens: 12-16 Days

Sunflower microgreens are the giants of the microgreen world, requiring 12-16 days to reach optimal harvest size. These substantial microgreens have thick, meaty cotyledons and sturdy stems.

The longer growing period allows sunflower microgreens to develop complex, nutty flavors. They're incredibly satisfying to eat and add substantial texture to any dish.

Black oil sunflower seeds are typically used for microgreen production and require hulled seeds for best results. The shells must be removed, or they'll create mold issues during the longer growing period.

Beet Microgreens: 12-15 Days

Beet microgreens, with their stunning red and green coloration, take 12-15 days to fully develop. The longer timeline allows the characteristic red veining and stems to develop fully.

Both the cotyledons and the first true leaves are edible and delicious. The flavor is mild and slightly earthy, with none of the sometimes overpowering earthiness of mature beets.

These colorful microgreens are as beautiful as they are nutritious, making them perfect for garnishing and adding visual interest to dishes.

Chard Microgreens: 14-16 Days

Rainbow chard microgreens are among the slowest-growing common varieties, requiring 14-16 days for optimal harvest. The wait is worth it for the spectacular array of colors - red, yellow, orange, and pink stems topped with green leaves.

The longer growing period allows the stems to develop their full coloration and the leaves to become more substantial. Harvest when the cotyledons are fully expanded and the first true leaves are just beginning to emerge.

Factors That Affect Growing Times

Temperature Control

Temperature is the single most important factor affecting microgreen growing speed. Most microgreens prefer temperatures between 65-75°F for optimal growth.

Higher temperatures generally speed up growth but can also lead to leggy, weak plants and increased disease pressure. Lower temperatures slow growth but often produce more flavorful, substantial microgreens.

Maintaining consistent temperatures throughout the growing cycle ensures predictable harvest timing and better quality crops.

Light Exposure

Proper lighting dramatically affects both growth speed and quality. Microgreens need adequate light once their cotyledons emerge to develop properly and avoid becoming leggy and pale.

LED grow lights providing 12-16 hours of daily illumination typically produce the fastest, most robust growth. Natural sunlight works well too, but can be less consistent and harder to control.

Insufficient light extends growing times and produces weaker, less flavorful microgreens.

Humidity and Airflow

Proper humidity levels (40-60%) and gentle airflow help microgreens grow at optimal speeds while preventing mold and disease issues.

Too much humidity slows growth and encourages mold, while too little can stress plants and extend growing times. Good air circulation helps maintain ideal growing conditions and promotes healthy, timely growth.

Optimizing Your Harvest Timing

Visual Cues for Harvest Readiness

Learning to read visual cues helps you harvest at the perfect moment regardless of the calendar. Look for fully expanded cotyledons with good color and sturdy stems.

Most microgreens are ready when the cotyledons are fully opened and the first true leaves are just beginning to emerge. Harvesting before true leaf development ensures the best texture and flavor concentration.

Avoid waiting too long, as microgreens become tougher and less flavorful once they begin putting energy into true leaf development.

Successive Planting Strategies

Understanding growing timelines allows you to plan successive plantings for continuous harvests. Start new trays every 3-4 days for fast varieties or every week for slower ones.

This approach ensures you always have fresh microgreens ready for harvest while avoiding the feast-or-famine cycle that many beginners experience.

Keep detailed records of planting dates and varieties to perfect your timing and predict harvest dates accurately.

Storage and Shelf Life Considerations

Harvest timing also affects storage life. Microgreens harvested at their peak maintain quality longer than those harvested too early or late.

Most properly harvested microgreens stay fresh for 7-10 days when stored correctly in the refrigerator. This knowledge helps you time plantings to match your consumption patterns.

Common Timing Mistakes to Avoid

Harvesting Too Early

The most common mistake beginners make is harvesting too early, often due to excitement or impatience. Microgreens harvested before their cotyledons are fully developed lack flavor and nutrition.

Wait for the cotyledons to fully expand and develop their characteristic color. This patience pays off with more flavorful, nutritious harvests.

Waiting Too Long

On the flip side, waiting too long results in tough, bitter microgreens with reduced nutritional value. Once true leaves begin developing significantly, the eating quality rapidly declines.

Most varieties have a 2-3 day optimal harvest window. Learn to recognize this window for each variety you grow.

Growing microgreens successfully is all about timing, and understanding the specific timeline for each variety sets you up for consistent success. Whether you're growing lightning-fast radishes or taking your time with beautiful sunflower microgreens, knowing what to expect helps you plan better and harvest at peak quality.

Remember that these timelines are guidelines - your specific growing conditions will influence actual harvest dates. Keep detailed records, observe your plants closely, and adjust your expectations based on your unique setup. With experience, you'll develop an intuitive sense for when each variety is ready for that perfect harvest.

Want to keep learning?

1. Microgreens 101: Everything You Need to Know
2. Explore All Microgreen Varieties (Plant Database)
3. Recipe: Sunflower Microgreen Salad
4. Recipe: Microgreen Pesto

Equipment That Affects Growing Speed

Your growing setup directly impacts how quickly your microgreens develop. Temperature is the biggest factor - most microgreens grow fastest at 65-75°F. Below 60°F, even fast varieties like radish can take an extra 2-3 days to reach harvest size. Above 80°F, you risk leggy growth and increased disease pressure.

LED grow lights can shave 1-2 days off growing times compared to windowsill growing, especially during winter months. Position lights 12-18 inches above your trays and run them for 12-16 hours daily. Cool white LEDs work well for most varieties, though full-spectrum lights give slightly better color development in slower varieties like beets and chard.

Growing medium choice matters more than you might expect. Coconut coir holds moisture well but can slow germination by 12-24 hours compared to hemp mats or paper towels. Soil mixes provide the most nutrients for longer-growing varieties but add an extra day to most timelines due to slower initial root penetration.

Common Growing Problems That Delay Harvest

Overwatering is the number one issue that extends growing times. Soggy growing medium restricts oxygen to roots, slowing development by 2-4 days. Water from the bottom once daily for most varieties, twice daily only for very fast growers like radish and cress.

Poor air circulation creates humid microclimates that encourage fungal issues and leggy growth. Position a small fan to create gentle air movement - this can actually speed growth by 10-15% while preventing damping off disease that kills entire trays.

Seed density problems show up differently depending on the variety. Overcrowded trays of sunflower or pea shoots compete for light and grow tall but spindly. Undercrowded fast growers like mustard develop larger individual plants but lower overall yields. Follow seed density guidelines: roughly 1-2 tablespoons per 10x20 tray for small seeds, 1/2 to 3/4 cup for larger seeds like sunflower.

Temperature Troubleshooting

Cold conditions below 60°F cause specific symptoms. Brassicas like broccoli and kale develop purple tinges in their stems and leaves. Pea shoots become stunted with thick, shortened stems. Basil microgreens may refuse to germinate entirely below 65°F.

Heat stress above 80°F creates different issues. Fast growers bolt to true leaves prematurely, reducing the harvest window. Lettuce varieties become bitter. Cilantro develops its characteristic soapy flavor much earlier than normal, sometimes by day 8 instead of the usual day 12-14.

Planning Your Growing Schedule

Successful microgreen production requires staggered plantings based on actual growing times, not just variety timelines. Start new trays of fast growers every 3-4 days to maintain steady harvests. Medium and slow growers need new plantings every 5-7 days.

Consider your household consumption when planning. A family of four typically uses one 10x20 tray of mixed microgreens per week. Plant accordingly: if you're growing 8-day broccoli, start a new tray every 6 days to account for processing time and ensure overlap.

Seasonal adjustments are necessary. Winter growing times increase by 15-25% due to lower light levels and cooler indoor temperatures. Summer growing may be 10-20% faster but requires more attention to watering and ventilation. Track your actual harvest dates for the first few months to dial in your specific growing environment's timing.

Mix fast and slow varieties strategically. Plant radish and sunflower shoots on the same day - the radish will be ready for harvest just as the sunflowers are developing their first true leaves, giving you varied textures and flavors for salads throughout the growing cycle.