To grow pea shoots hydroponically, soak whole field or snow pea seed for about 6 hours, spread it thickly on a moist mat or shallow medium in a 1020 tray, keep it covered for about 3 days, then grow it under light and harvest when shoots are 3–6 inches tall. Utah State University Extension lists about 150 grams of seed per tray and a harvest at 8–10 days; many growers let them go to 12–14 days for longer, sweeter shoots. Cut above the lowest leaf so some trays give a smaller second cut.
Key takeaway: Soak 6 hours, sow densely, keep dark for 3 days, water from below, and cut at 3–6 inches before tendrils get tough.
| Step | Guideline |
|---|---|
| Seed | Speckled (Dun) pea, Dwarf Grey Sugar, or other untreated pea seed |
| Seed per 1020 tray | About 150 g (USU) |
| Soak | About 6 hours |
| Covered time | About 3 days |
| Light | Up to 18 hours a day |
| Harvest | 8–14 days, 3–6 inches tall |
| Regrowth | Often one smaller second cut |
What Pea Shoots Are
Pea shoots are the young stems, leaves, and tendrils of pea plants. They taste like fresh garden peas and are tender enough to eat raw in salads, sandwiches, and stir-fries. They are bigger than most microgreens and are often sold by the bunch or bag rather than by the clamshell.
Because pea seed is large and full of stored energy, pea shoots need nothing but water to reach harvest. That makes them one of the simplest crops to grow in a hydroponic tray.
Choosing Pea Seed
- Speckled (Dun) pea: the standard for shoots; inexpensive, fast, and sweet.
- Dwarf Grey Sugar: tender, with pretty leaves and a mild flavor.
- Snow peas such as ‘Oregon Giant’: large, sweet shoots.
- Avoid treated seed: seed coated with fungicide is not for eating.
Buy seed sold for sprouting or microgreens, in bulk if you grow often. Store it cool and dry.
How to Grow Pea Shoots Step by Step
- Soak. Rinse seed and soak for about 6 hours. Seeds should swell. Don’t soak much longer or they may split and rot.
- Prepare a tray. Use a 1020 tray with holes over a solid tray. Line it with a hemp mat, coco coir, or a thin layer of seed-starting mix.
- Sow. Spread soaked seed evenly in a single dense layer.
- Cover. Put another tray on top with light weight for the first day or two, then flip it to make a dome.
- Uncover after about 3 days. Shoots should be about 1 inch tall and pale.
- Grow under light. Water from below, run a fan, and give strong light.
- Harvest. Cut when shoots are 3–6 inches tall.
For tray setup see how to grow microgreens hydroponically.
Water Only, or Nutrients?
Pea shoots get almost everything they need from the seed. Plain, clean water is enough for one harvest. If you want a second cut, a very weak nutrient solution after the first cut can help the regrowth stay green. See hydroponic nutrients for seedlings for mild feeding levels.
Light and Temperature
Pea shoots like it cool. Utah State suggests about 72°F with lights on and 68°F with lights off for microgreens in general; pea shoots tolerate even cooler rooms, around 60–70°F. Warm, humid conditions invite mold. Strong light keeps stems short and leaves dark green. A shop LED 6–12 inches above the tray works well. See seed-starting shelf with grow lights.
When and How to Harvest Pea Shoots
The best eating stage is when shoots are 3–6 inches tall, with a few leaves open and tendrils just forming. Taste one to decide. Cut with clean scissors above the lowest leaf or node. If you cut below every leaf, the stem won’t regrow. Rinse, spin dry, and refrigerate.
Older, taller pea shoots get stringy and fibrous, especially at the base. If shoots are tall, harvest only the top few inches.
Getting a Second Cut
Many trays give a second, smaller harvest about a week after the first. Leave at least one leaf node on each stem, keep watering, and feed lightly. The second cut is usually thinner and less uniform. After that, compost the tray and sow fresh.
Growing Pea Shoots in Soil-Free Systems
Pea shoots grow well on hemp mats, coco mats, and burlap, which are clean and easy to compost. They also work in ebb-and-flow trays if the flood is short so seeds don’t sit wet. Avoid deep water; the seed can rot. See ebb and flow hydroponics.
Common Pea Shoot Problems
- Sour smell or slimy seed: soaked too long or kept too wet. Rinse well and drain.
- White fuzz: either root hairs (normal) or mold. Root hairs vanish when misted; mold doesn’t.
- Uneven height: uneven sowing or old seed.
- Pale shoots: not enough light after uncovering.
- Tough stems: harvested too late.
Storing Pea Shoots
Store dry pea shoots in a sealed bag or container with a paper towel at 35–40°F. They keep about a week. Wash only right before eating. See hydroponic food safety.
Yield and Cost
A 1020 tray sown with about 150 grams of pea seed can give roughly 8–12 ounces of shoots, more if you get a second cut. USU estimated the seed cost per tray at a little over a dollar in early 2026. Because shoots are sold by weight or by the bunch, they can be a good crop for small market growers. See selling microgreens online.
Pea Shoots vs Pea Microgreens vs Pea Sprouts
Pea sprouts are germinated seeds eaten whole, grown in a jar without light; see growing sprouts in a jar. Pea microgreens are cut at an early stage, a few inches tall. Pea shoots are the same plant grown a little longer, with leaves and tendrils. The method is the same; only the harvest time changes.
Cooking With Pea Shoots
Pea shoots are versatile. Toss raw tips into salads or onto sandwiches, blend them into pesto, or stir-fry them for 30–60 seconds with garlic and a splash of soy sauce, a classic in Chinese cooking. Longer, older pea shoots are better cooked than raw. Add them at the very end of cooking so they stay bright green.
FAQs
How long should I soak pea seeds?
About 6 hours.
How long until pea shoots are ready?
About 8–14 days.
Do pea shoots regrow?
Often once, if you cut above a leaf node.
Can I use grocery-store dried peas?
Whole dried peas may sprout, but split peas won’t. Sprouting seed is more reliable.
Do pea shoots need nutrients?
No, water is enough for the first cut.
Can I grow pea shoots in a window?
Yes, but a grow light gives sturdier shoots.
Sources
- Utah State University Extension — Grow Your Own Microgreens
- University of Maryland Extension — Growing Microgreens and Baby Greens Indoors
- Perennia — Microgreens Fact Sheet
- Photo credits (Wikimedia Commons, edited with titles): Garden pea sprouts by Yarzaryeni (CC BY 3.0); Lufa Farms Microgreens in Trays by Lufa Farms (CC BY-SA 2.0); Mung bean sprouts, close-up by pics_pd (CC0); Lufa Farms Microgreens in Trays by Lufa Farms (CC BY-SA 2.0); Dahlias started indoors by F. D. Richards from Clinton, MI (CC BY-SA 2.0)