How to Grow Pea Shoots Hydroponically

Quick answer

Pea shoots (Pisum sativum) reach harvest in 12–18 days from seed at pH 6.0, EC 0.8, DLI 10–12, and air 18–24 °C. Sweet, mild, multi-cut microgreen that produces 2–3 harvests per tray. Best in shallow tray systems with hemp mats or coco coir.

Conditions

Parameter	Value
pH	5.5–6.5 (6.0 ideal)
EC	0.4–1.0 mS/cm
Air temp	18–24 °C
Water temp	18–22 °C
Humidity	50–70%
DLI	10–12 mol/m²/day
Photoperiod	16 h
Spacing	2 cm (dense)
Days to harvest	12–18
Yield/tray	~300–500 g per 1020 tray, multi-cut

What makes pea shoots different from other microgreens

Two traits set pea shoots apart:

• Multi-cut. Unlike most microgreens (cut once, restart), pea shoots regrow after cutting. A single tray produces 2 or even 3 harvests.
• Slightly slower. 12–18 days vs 7–10 for radish or broccoli. The longer cycle delivers more biomass.

This makes pea shoots one of the most productive microgreens by weight.

Recommended system

Ebb and flow on 1020 trays — standard commercial setup. Wick system — simple, suits the modest moisture needs. Hand-watering on hemp mats — fine for home scale.

The pea-shoot workflow

Slightly different from smaller-seed microgreens:

1. Soak peas 12–24 hours in water. Drain.
2. Spread densely on a damp hemp mat in 1020 tray. ~150 g of seed per tray.
3. No dark phase needed (or only 1 day; pea seeds germinate aggressively).
4. Mist twice daily for first 5 days.
5. Light exposure days 5–14. Standard 16h photoperiod.
6. First cut at day 12 when shoots are 10–15 cm tall.
7. Cut 2 cm above the seed. Regrowth in 7–10 days for second cut.

Variety picks

• Whole green peas (Pisum sativum) — bulk food store, cheapest option. Works fine.
• Speckled peas — slightly milder shoots, pretty seed color.
• Marrow peas — premium variety, slightly larger shoots.
• Snow pea seed — produces shoots with tendril-heavy growth, restaurant favorites.

Any pea seed sold for sprouting or cooking works. Avoid pesticide-treated agricultural seed.

Light and temperature

• Air 18–24 °C. Cool tolerance is good.
• DLI 10–12. Cheap LED at 8 inches.
• Photoperiod 16 hours.
• Humidity 50–70%.

Pea shoots tolerate lower light (DLI 8) better than most microgreens — useful in low-budget setups.

Nutrients

Pea seeds carry significant nutrient reserves. Minimal external nutrient required:

• Days 1–5: plain water.
• Days 5–harvest: dilute nutrient at 0.6–0.8 EC.

Some commercial growers use only water — yield is slightly lower but flavor is identical.

Common problems

• Mold on seed surface — too dense, too damp. Reduce seed density; improve airflow.
• Damping off — too much moisture. Reduce misting.
• Yellow shoots — insufficient light.
• Sour smell — anaerobic conditions; improve airflow.
• Weak regrowth after first cut — cut too low (below the cotyledon); next time leave 2 cm.

Multi-cut strategy

The key pea-shoot economic advantage:

• First cut day 12: ~200 g per tray.
• Second cut day 21: ~150 g (smaller shoots, still tender).
• Third cut day 30 (if attempted): ~100 g (shoots getting woody).

Total: 400–500 g per tray over 30 days vs single-cut microgreens' 200–300 g per 10 days. Different production model; choose based on your buyer demand.

Harvest

Cut with sharp scissors 2 cm above the seed line. Rinse, spin-dry, refrigerate.

Pea shoots keep 7–10 days post-harvest — among the longest-shelf-life microgreens. Restaurant supply customers prefer pea shoots specifically for this reason.

Culinary uses

What pea shoots pair with:

• Stir-fries — wilt at the end, classic Cantonese.
• Salads — raw, mixed with lettuce.
• Pasta — chopped, added at the end of cooking.
• Sushi — as a garnish for sashimi and rolls.
• Soup garnish — floats nicely on miso and pea soup.

See also

• Peas — the mature plant
• Microgreen broccoli
• Microgreen radish
• Sunflower microgreens