The Forever Groundcover
Sessile joyweed is the ultimate bulletproof edible groundcover for a Perth backyard. If you are struggling to get traditional English spinach to survive the blazing WA sun, this plant is the perfect swap. It thrives in conditions that would melt other leafy greens, making it a staple for local food forests and backyard growers. The botanical name is Alternanthera sessilis, and you might also hear it called mukunuwenna or sissoo spinach. It belongs to the Amaranthaceae family, which means it is related to beetroot and amaranth. It grows as a low, sprawling perennial herb that roots itself wherever the stem joints touch damp soil. Our gutless Perth sand is usually a nightmare for growing veggies, but this plant is remarkably tough. It absolutely thrives in thick, hydrophobic Perth meyro sand as long as you dump some organic matter into the planting hole. It loves moisture and can easily handle the high pH of local bore water, which often stunts more delicate exotic herbs. While global gardening blogs say to plant this in full sun, a 44-degree January day locally will scorch the leaves if the soil dries out. In Perth, it performs best in part shade, ideally sitting under the dappled canopy of a larger fruit tree. If you plant it in full sun, you need to keep the dirt constantly damp or it will stall.
For local hobby farmers and backyard growers, it serves as an excellent living mulch. The dense mat of leaves blankets the ground, which drops soil temperatures significantly during summer and stops weeds from taking over. It is also a fantastic option for a chicken forage system because the birds love the leaves and the plant bounces back rapidly from heavy grazing.
From a science perspective, this green is an absolute powerhouse. When the leaves are dried, they consist of roughly 16% protein, which is an incredibly high ratio for a leafy vegetable. It is also packed with iron, calcium, and beta-carotene, making it a brilliant plant-based nutritional booster for daily meals.
Peer-reviewed medicinal studies show that Alternanthera sessilis contains powerful antioxidant and antimicrobial compounds. Research published in international pharmacology journals highlights its traditional use for liver health, with studies confirming it helps protect liver tissue from oxidative stress.
Other clinical trials have looked into its anti-inflammatory properties, showing it helps reduce swelling and internal inflammation.
In the kitchen, this plant is a dream because the leaves hold their texture beautifully when heated. Unlike English spinach which turns into a slimy mess, joyweed stays pleasantly crisp. You can harvest the young tips and toss them straight into a hot wok for a quick garlic stir-fry, or fold them into coconut-based curries and traditional Sri Lankan mallum dishes.
The taste is mild, earthy, and clean, with none of the strong bitterness or furry mouth-feel you sometimes get from plants high in oxalic acid. It makes a perfect green filler to bulk out morning omelettes, backyard stir-fries, or home-cooked soups.
Beyond meals, you can dry the leaves and stems to brew a herbal tea used in traditional medicine to cool the body and aid digestion. You can also crush the fresh plant to extract the liquid, which is used to make healthy herbal drinks and tonics.
Propagating your patch is incredibly simple and costs nothing. You just snip a 10cm piece of stem, strip the bottom leaves, and push it straight into damp potting mix or a glass of water. It will throw out fresh white roots from the nodal joints within a week, giving you a brand new plant ready to hit the ground.
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