1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike
1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike
1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike
1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike
1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike
1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike
1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike
1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike
1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike
1500 Seeds - Watercress Seeds (Nasturtium officinale) - Heirloom, Non-GMO Yellowcress Lettuce, Xa Lach Xoong or CAI Be Xoong | Easy to Grow, Fresh Flavor for Culinary - The Rike The Rike

Watercress (Nasturtium officinale) from Seed: cool, peppery, water-loving 1500 seeds

1SHWS-30032025

Regular price $9.00 Save $-9.00
239 in stock

Watercress (Nasturtium officinale) from Seed: cool, peppery, water-loving

TL;DR

A semi-aquatic perennial that wants cool, bright conditions and constantly moist roots. Start seeds on a damp medium, then keep the tray sitting in shallow, clean water. Harvest young and often. This is a home-growing guide; it does not offer dietary or medical advice.

Quick Definition

Nasturtium officinale is a creeping, water-loving herb in the mustard family. Not the garden “nasturtium” (Tropaeolum). It forms crisp, peppery leaves and tender hollow stems, thriving in continuously moist media or gentle, clean water flow.

At-a-glance Facts

  • What it is: Semi-aquatic brassica grown for peppery leaves.
  • Flavor: Fresh, crisp bite with a clean, peppery finish.
  • Best moments: Cool, bright seasons; steady moisture; frequent snips.
  • Grow basics: Surface-sow; keep evenly moist; set pots or trays in 2–5 cm water (≈ 0.8–2 in) and refresh often.
  • Pairs with: Shallow trays, pea gravel wicks, mild nutrient solution, morning light.
  • Safety flags: Water quality matters. Use clean source water; refresh often; avoid stagnant containers.
  • Storage (seeds): Airtight, cool, dry; label clearly.

Who it’s for / Who should skip

Who it’s for

  • Cool-climate growers or anyone with a bright, mild spot indoors.
  • Balcony and kitchen-garden folks who can keep a shallow tray topped up.
  • Harvest-often people who like tender, fast-regrowing greens.

Who should skip

  • Hot, sun-blasted spaces with warm standing water and no shade.
  • Anyone who can’t refresh tray water regularly.
  • Growers seeking set-and-forget crops in dry pots.

Decision criteria

  • Choose it if you have clean water, cool light, and time for frequent harvests.
  • Choose it if you want countertop or balcony trays with steady moisture.
  • Skip it if your site is consistently hot and dry.
  • Skip it if you dislike maintaining water hygiene.

Grow Basics

  • Light: Bright light without brutal heat. Morning sun, afternoon bright shade is ideal.
  • Temperature: Cool to mild is best. Shade trays during heat spikes.
  • Containers: Shallow tray or bowl with an inner pot. Keep 2–5 cm (≈ 0.8–2 in) clean water standing around the pot base.
  • Medium: Fine seed mix over a coarse base, or a thin layer of pea gravel to wick water upward.
  • Watering: Maintain constant moisture. As a start, top up 200–400 ml (≈ 0.8–1.7 cups) daily per small tray; refresh the whole tray every 1–3 days.

Sowing steps

  1. Pre-moisten: For each 1 L of seed mix, blend ~200 ml water (≈ 3/4 cup) until evenly damp.
  2. Surface-sow: Sprinkle thinly; do not bury. Press gently for contact.
  3. Dome & light: Cover with a vented clear lid. Bright light, cool-mild temps. Keep surface evenly moist by misting.
  4. Set in water: When seedlings are 1–2 cm tall, place the pot in a tray holding 2–3 cm water (≈ 0.8–1.2 in). Maintain that depth.
  5. Refresh rhythm: Replace tray water frequently to keep it fresh; rinse salts from media weekly.

Simple hydro variant

  • Use an inert medium (rinsed pea gravel or coco chips). Sow onto a thin cap of seed mix or a natural fiber mat.
  • Stand the pot so the lower 1–2 cm (≈ 0.4–0.8 in) stays submerged; roots will wick and then trail.
  • Optional: very mild nutrient solution at label’s lowest rate; flush weekly with clean water.

Care routine

  • Trim often: Cutting promotes fresh regrowth and keeps plants compact.
  • Airflow: Good airflow over trays reduces algae and fungus gnat interest.
  • Shade cloth: In heat spells, add light shade to protect tenderness and flavor.

Harvest

  • Timing: Begin snipping when stems reach 8–12 cm (≈ 3–5 in). Young growth is crisp and mild-peppery.
  • Method: Shear the top third with clean scissors, leaving nodes to regrow.
  • Frequency: Harvest lightly every few days for a steady flush.

Taste & Habit Tuning

  • Too bitter or tough? Harvest younger; add shade in heat; refresh water more often.
  • Leggy stems? Increase light or trim more frequently to encourage side shoots.
  • Algae film? Rinse the tray, scrub gently, and switch to opaque containers or pebbles that block light.

Rituals

  • Morning top-up: change or refill the tray water before the day warms.
  • Midweek rinse: pour through fresh water to leach salts; wipe the tray.
  • Friday shear: light haircut for salads and to keep plants compact.

Sourcing & Quality

  • Botanical clarity: Labeled Nasturtium officinale, not Tropaeolum (the ornamental nasturtium).
  • Seed condition: Clean, dry, uniform; avoid musty packets.
  • Packaging: Paper sachets or tins; minimal plastic; clear species labeling.

Storage (seeds)

Keep seeds airtight with a desiccant in a cool, dark cupboard. Reseal promptly after sowing; label clearly.

Comparison Table

  • Watercress (Nasturtium officinale): Semi-aquatic; cool and constant moisture; peppery and crisp.
  • Garden cress (Lepidium sativum): Soil or microgreen style; faster, spicier leaves; drier culture.
  • Upland cress (Barbarea verna): Land-grown cress with watercress-like bite; prefers cool, moist soil.

Safety

Growing guidance only; not dietary or medical advice.

  • Water quality: Use clean, potable water. Refresh trays frequently; avoid stagnant, warm water.
  • Source: Do not harvest from streams or ditches of uncertain quality. Home trays are preferred.
  • Allergy: As a mustard-family plant, it may bother sensitive individuals; handle and taste cautiously.
  • Concentrates: Leaves are not the same as essential oils; do not ingest essential oil.

FAQ

  1. Direct sow or start in trays? Start in a small pot, then stand it in a shallow water tray once seedlings are 1–2 cm tall.
  2. Does it need flowing water? Gentle circulation helps but isn’t required. Frequent water refreshes are enough at home scale.
  3. Full sun or partial? Bright light with cool temps. Morning sun and afternoon bright shade work well.
  4. Why are stems floppy? Usually low light or heat stress. Increase light and trim to promote branching.
  5. Can I grow it purely hydroponically? Yes, with a mild nutrient solution and weekly flushes; keep roots oxygenated.
  6. How often to harvest? Lightly every few days for tender shoots and steady regrowth.

Sources

META (Shopify)

Title: Watercress Seeds: Grow & Care Guide
Slug: watercress-seed-grow-guide
Description: Practical guide to watercress from seed: tray-in-water method, cool temps, frequent harvests, water hygiene, safety, and FAQs.
Keywords: nasturtium officinale seeds, grow watercress at home, hydroponic cress, cool season greens, shallow tray method
Category: Home Garden
Reading Mode Hints: Short paragraphs, mobile-first; images after TL;DR and before Safety.
Disclaimer: Informational growing content; not medical or dietary advice.

Written by Greenhouse Editorial. Reviewed by Dr. A. Nguyen, Registered dietitian.
Inventory Last Updated: Dec 02, 2025

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Return RMA

A return merchandise authorization # (RMA #) will be issued for ALL returns. Please do not send back any items without an RMA#. Customer is responsible for all return shipping costs unless the item arrives DOA or DAMAGED. Once the item is received back to our warehouse a technician will verify if defective. Please allow 72 hours (longer during Holiday seasons) for this process. Once verified as defective a Replacement or Refund of the SAME item will be issued free of cost to the customer. If item is returned free of defect and in working condition, customer is then responsible to have item shipped back to them. ALL returns must be shipped back within 10 days of receiving RMA# and must be in original packaging with any and all accessories included with return including all original Packaging.

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Exclusion from Coverage

Damage resulting from abuse or misuse.

Damage resulting from extended wear and tear.

Damage resulting from tampering or a customer modification.

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Consequential, incidental, indirect, punitive, exemplary, and/or special damages (although some states in the United States do not allow the exclusion or limitation of consequential or incidental damages, so this exclusion might not apply to you)

To Make a Return or Exchange

1) Contact us to get an RA (Returns Authorization) number.

2) Write this number on the outside of the package you are shipping back to us.

We recommend using USPS to ship your return.

RETURNS & REFUNDS

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