How to Grow Barley Grass
Wikimedia Commons
Barley Grass
Hordeum vulgare
grassBarley grass is the young green shoots of the barley plant, harvested before the grain head develops, typically at 7-10 inches tall. It is nutrient-dense and commonly used fresh, juiced, or dried as a health supplement. The grass is known for its bright green color, mild sweet flavor, and high chlorophyll content.
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Example Barley Grass timeline · Pittsburgh, PA (Zone 6b)
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Plant Barley Grass
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Barley Grass
Around Apr 24≈ 7 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Barley grass grows in nearly all zones; cool-season crop thrives in spring and fall (zones 3-8 ideal)
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Get my Barley Grass timeline →Growth Stages
Germination & Sprouting
3-5 daysSeeds begin sprouting within 2-3 days; tiny white roots emerge, followed by pale green shoots breaking soil surface.
Keep soil constantly moist; maintain 60-70°F temperature for optimal germination. Provide indirect light initially.
Seedling Growth
2-3 daysYoung green shoots emerge and begin developing; grass appears light green with 1-3 inches of growth.
Increase light exposure gradually; ensure consistent moisture; begin moving trays to brighter location.
Leafy Growth & Thickening
3-4 daysDense, vibrant green grass develops; shoots reach 3-7 inches with multiple leaf blades; root system develops white secondary roots.
Provide full sun or bright indirect light; maintain even moisture; ensure good air circulation to prevent mold.
Juice-Ready Maturity
1-2 days windowGrass reaches 7-10 inches with bright emerald color and full leaf development; second leaf blade emerging at base signals peak nutrient density.
Optimal harvest window; grass is tender and juicy at this stage. Ensure no pest or disease damage.
Grain Development (if left unharvested)
50-80 additional daysIf allowed to mature, grass produces flowering heads and eventually grain; plant becomes tougher and less suitable for juicing.
Allow soil to dry slightly; reduce watering. Only pursue if grain harvest is the goal (takes 60-90 days total).
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Row covers during seedling stage; handpick if small populations; neem oil spray for severe infestations
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Maintain moisture to discourage; use sticky traps; ensure good drainage
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Improve air circulation; avoid overhead watering; sulfur dust or potassium bicarbonate spray if severe
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Ensure good ventilation; avoid overwatering; use small fan for air movement; reduce humidity
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Maintain consistent moisture; remove weeds; beneficial nematodes for soil-dwelling stages
Uses
Nutritional Supplement & Detoxification
MedicinalBarley grass juice is consumed as a health supplement for its high chlorophyll, enzymes, vitamins, and minerals. Proponents claim it supports detoxification, immune function, and energy levels, though human clinical evidence is limited. [source]
Fresh Juicing & Smoothies
CulinaryYoung barley grass is pressed into fresh juice or blended into smoothies, shots, and health drinks. The grass provides a mild, slightly sweet, grassy flavor and vibrant green color. [source]
Powdered Supplement
CulinaryDried and powdered barley grass is mixed into beverages, smoothie bowls, baked goods, and health bars for convenient nutritional fortification. [source]
Indoor Microgreen Gardening
HouseholdBarley grass is one of the easiest grasses to grow indoors on trays or in small containers, making it ideal for home gardeners wanting fresh greens year-round. [source]
Pet Nutrition & Hairball Control
WildlifeFresh barley grass is offered to cats, dogs, and rabbits to support digestion, provide fresh greens, and help with hairball management. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest barley grass when it reaches 7-10 inches tall, typically 7-10 days after sowing. For juicing, cut just above soil level with sharp scissors or a knife. Harvest in the morning for maximum juice content. The grass can be used immediately or stored refrigerated for up to 5 days. For maximum nutrient density, harvest just as the second leaf blade emerges at the base. If regrowing for second harvest, cut higher to allow regrowth; typically produces 1-2 regrowths before replanting is needed.
Fun Facts
- 🌱 Barley grass can be regrown 1-2 times after the first harvest by simply watering the stubble left in the soil, making it economical for home growers.
- 🌱 Barley is one of the oldest cultivated grains, with archaeological evidence dating back over 10,000 years; barley grass juicing became popular in the 1970s as a health trend.
- 🌱 Barley grass contains a unique enzyme called protease that helps break down proteins, and it reaches peak nutrient density right when the second leaf blade emerges—a window of only 1-2 days.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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