Watercress Seeds (Nasturtium officinale), 4 Pack x 500 Seeds, Peppery Cool-Season Aquatic Green for Wet Trays, Water Containers and Hydroponic Setups, Non-GMO True Watercress, Not Ornamental Nasturtium

Watercress Seeds grow Nasturtium officinale, the peppery, cool-season leafy green traditionally grown in and beside water. This is a seed packet for planting, not harvested watercress, live plants, dried herbs, a powder, or a ready-to-eat green.

Product Details

An important point up front is identity, because the word nasturtium is shared by two very different plants. This is true watercress, Nasturtium officinale, an aquatic or semi-aquatic salad green, not the ornamental garden nasturtium (Tropaeolum) grown for round leaves and bright edible flowers. Shoppers also look for it as yellowcress or by its Vietnamese names xa lach xoong and cai be xoong, and it suits kitchen gardeners, salad lovers, and hydroponic and container growers.

It also helps to know how true watercress differs from the other cress greens. Garden cress (Lepidium sativum) is the mustard-flavoured seedling often sprouted on damp paper for egg-and-cress sandwiches; land cress (Barbarea verna) is a soil-grown plant with a similar peppery bite that does not need standing water; and this, Nasturtium officinale, is the classic aquatic watercress. All are peppery, but only this one is grown in or beside water.

Getting started is easy if you keep things cool and wet. Sow the fine seed on the surface or barely below it, no more than about a quarter-inch down, in moist, organic-rich compost, and keep it steadily damp; at around 50 to 60 degrees Fahrenheit it usually germinates in about seven to fourteen days. Because the seed is small, many growers start it in a tray or small pots where the moisture is easy to control before moving plants to their final spot.

The simplest home method is a pot standing in water. Set a pot of compost in a saucer, tray, or bucket holding two to three inches of water so the soil stays constantly saturated from below, and refresh that water once or twice a week to keep it clean rather than stagnant. A spot near a pond, a boggy bed, or a shallow container water garden works just as well. The one rule that really matters is that the roots must never dry out.

Watercress is firmly a cool-season plant. It grows best in the milder parts of the year and prefers temperatures around 60 to 70 degrees Fahrenheit; in real heat, above roughly 85 degrees, growth slows, the leaves turn sharply bitter, and plants rush to flower. Partial sun to light shade suits it well, and full sun is fine only where the water keeps the roots cool and constantly wet. In many gardens it is happiest in spring and autumn, and it can carry on as a hardy perennial where winters are not too severe.

It is a poor fit for a few situations. It is not a dry-bed or drought plant, not a warm-season crop that shrugs off summer heat, and not a set-and-forget green, since it wilts quickly if the roots dry. Growers without a reliably moist or wet spot should choose a different green.

Harvesting is generous and repeatable. Once plants are established, snip the top few inches of stem, cutting about four inches above the base and never taking more than about a third of a plant at once, and it will regrow again and again as a cut-and-come-again crop. Pinching out the growing tips keeps plants bushy and delays flowering, which is when the leaves start to lose their sweetness.

It also takes very naturally to soil-free growing. Watercress does well in a simple home hydroponic setup, where it tends to prefer slightly alkaline water, and it can be grown as a quick, peppery microgreen on a windowsill for salads and garnishes. However you grow it, a clean, fresh water supply is what keeps both the flavour and the plant at their best.

In the kitchen the appeal is that clean, peppery bite. The tender stems and leaves are eaten raw in salads and piled into sandwiches, stirred into a classic watercress soup, or wilted at the last moment into stir-fries and noodle bowls, with the pepperiness mellowing as it cooks. In Vietnamese kitchens it is a familiar green for soups and quick sautes.

Two responsible notes round things out. First, watercress spreads readily, not just by seed but from stem fragments that root at the leaf joints, so in the open it can naturalise in streams and ditches and form dense mats that slow water flow; keeping it to trays, containers, or managed beds is the neighbourly choice. Second, raw watercress gathered from wild or unknown water can carry waterborne parasites such as flukes, especially near grazing livestock, which is exactly why growing your own in clean, frequently changed water, or thoroughly cooking wild-gathered leaves, is the safe way to enjoy it.

One of the easiest things about watercress is that you do not always need to start from seed. A sprig with a few leaves, whether from your own plants or even a fresh bunch from the shop, will readily root in a glass of water within days and can then be potted up, so a single packet can quickly become an ongoing, self-renewing supply.

For lush, mild leaves, pay attention to the water and feeding. Watercress is a hungry plant that grows fastest in rich compost with a steady, gentle feed, and it stays sweetest when the water around its roots is fresh and cool rather than warm and still. In a container, tipping out and replacing the standing water regularly keeps it oxygenated and discourages the algae and odours that build up in stagnant trays.

A few problems are worth watching for. In warm, still conditions the leaves can attract aphids and flea beetles, which a fine mesh or a quick rinse usually keeps in check; algae may green up the standing water, which fresh changes and a little shade help control; and any plant left to get hot and dry will bolt to flower, at which point the leaves turn bitter and it is time to cut back hard or resow. Rotating fresh sowings every few weeks keeps a young, tender supply coming.

In practice, most home growers keep a pot or two going from early spring, move them somewhere cool and bright through summer, and let hardy plants stand into the cooler months where the climate allows. A wide, shallow container holds moisture better than a narrow one, and grouping pots keeps the root zone cool, so plants stay productive far longer than a single cutting would suggest.

Treat it as a moisture-loving leafy-green project rather than a fixed harvest, since germination and growth depend on temperature, water, and care. Keep unused seed cool, dry, and sealed, and follow the packet directions for sowing, spacing, and harvest timing that suit your setup.

Product Highlights

• Watercress Seeds grow Nasturtium officinale, the peppery, cool-season aquatic salad green also known as yellowcress, xa lach xoong, or cai be xoong, with crisp, tangy, mustard-family leaves that add a fresh bite to salads, soups, and sandwiches.
• Important to know this is true watercress, Nasturtium officinale, not the ornamental garden nasturtium (Tropaeolum) grown for round leaves and flowers, so it is chosen as a salad and soup green rather than as a flowering ornamental plant.
• Grown in and beside water, it suits shallow trays standing in water, wet or boggy beds, a container in a saucer of water, or a hydroponic setup, which makes it a favourite with kitchen gardeners and small-space growers without a stream.
• It is a cool-weather plant that needs constant moisture: surface-sow the seed and keep it steadily wet in partial sun to light shade, use clean refreshed water rather than warm stagnant water, and harvest shoots cut-and-come-again for repeat pickings.
• Set fair expectations, since it wilts quickly if the roots dry and it can naturalise in wild waterways, so keep it to trays, containers, or managed beds, avoid planting along wild ponds and streams, and store any spare seed cool, dry, and sealed.

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