Growing offerings of seeds, bulbs, as well as tubers and rhizomes grown and collected from KoruKai Herb Farm, Banks Peninsula.
Grown in biological, organic, alive soil, chemical-free, synthetic fertiliser-free, herbicide-free.
Plants are sold and shipped during their winter dormancy from July until mid-September. This allows us to ship them bare-rooted, and the transplanting success rate is significantly higher than sending pots with soil in mid-summer and transplanting seedlings during their growing period.
You can sign up for the waiting list under each plant. You will then receive an email once they are back in stock.
Plants are grown spray-free, free from chemicals, herbicides, pesticides and fungicides. We are a biological farm that enhances soil life and works in harmony with natural cycles.
At KoruKai Herb Farm, we produce 6-8 tonnes of compost and 10 tonnes of vermicast per year, so we know what tools are necessary and handy to have on hand.
We offer them here so you can make great compost and vermicast as well. Join us at our online compost-making class and get our comprehensive worm-farming guide.
There are 47 products.
Available again in July 2026. Sign up below to go onto the waiting list.
Woundwort (Stachys sylvatica)
Family: Lamiaceae
This plant have been grown organically at KoruKai Herb Farm, Banks Peninsula. Free from synthetic fertiliser, pesticides and herbicides.
You will get 3 dormant plants with growing tips. Please find growing information and photos below.
Egyptian Walking Onions are a hardy, perennial “plant once and harvest for years” onion that keeps on giving season after season. Also known as Tree Onions, Top Onions, or Winter Onions, they produce edible greens, small bulbs, and unique bulbils that replant themselves naturally—walking their way across your garden.
Incredibly easy to grow and highly productive, these resilient onions multiply year after year, making them a must-have for any edible garden, food forest, or self-sufficiency setup.
1 bag contains 10 bulbils/topsets.
Available again in July 2026. Sign up below to go onto the waiting list.
Zingiber Mioga
Family: Zingiberaceae
Commonly known as Japanese Ginger, Myoga or Mioga.
A beautiful member of the ginger family, with lovely tropical foliage and stunning small flowers that form at the base in late summer / early autumn. The part you harvest is the young flower shoot before it opens. This pink/yellow lovely early flower can be eaten raw, pickled or sautéed to provide a gingery and zesty flavor to any dish.
Order is for 1-2 dormant rhizomes (depending on size) with good, defined growth nodes ready to send up a few strong shoots in spring (see sample image below). We will either send one large or 2-3 smaller ones.
A compost thermometer is an essential tool for successful hot composting and worm farming, whether in a home garden or commercial setup.
It provides a clear indication of microbial activity inside your compost pile, helping you determine when to turn it and whether your carbon-to-nitrogen balance is working correctly. Temperature readings quickly show if your mix contains too many “greens” (too hot), too many “browns” (too cold), or insufficient moisture (low microbial activity).
Without temperature monitoring, composting becomes guesswork—this tool allows you to refine your process and consistently produce high-quality compost over time.
Made from stainless steel with a long probe designed to reach deep into compost piles and soil.
Length: 50 cm
Heavy-duty TeaLAB extract bag made from 400 micron nylon mesh and climbing-grade binding, designed for making high-quality compost and vermicast extracts. Durable, reusable, and built to last.
A robust, reusable extraction tool designed for serious gardeners, growers, and soil biology enthusiasts.
Perfect for use in compost extract or tea brewers with included carabiner clip for easy suspension.
Available in two sizes:
ComposTex Compost Cover (compost fleece) is a breathable, UV-resistant fabric designed to protect compost piles and windrows while still allowing oxygen flow for healthy decomposition. It sheds rain and snow melt while maintaining ideal aerobic conditions.
At KoruKai Herb Farm, we also use it for simple, low-tech worm farming systems directly on the ground.
Available sizes (please choose below):
1.20m x 1.20m
1.20m x 2.40m
1.20m x 3.66m
For different sizes, large quantities or a whole 50m roll (3.66m width) please send an email to Kai at [email protected] for a quote. We can supply any length required.
We can do any length you require and the width will be 3.66 metres.
Worm Supplement, Fungal Enhancer & Worm Farm Conditioner
A specially formulated blend designed to support a thriving worm farm ecosystem. It provides essential nutrients, calcium, grit, carbon, and trace elements to keep your worms active and productive.
Made with lime, humates, seaweed, and biochar, this blend helps balance pH, enhance beneficial fungi, and improve nutrient retention for healthier, more efficient composting.
Available in 500g and 1kg bags (please select below).
This amazing guide brings together what we have learnt, observed and experienced over the last 12 years of managing several worm farms to get amazing worm castings for our farm and vegetable gardens.
In this guide, with 70 pages, you will learn how to turn food scraps and farm waste into rich compost and fertiliser to regenerate soil and bring back life force to the below ground livestock - the microbes. This turns on nutrient cycling, grows resilient and healthy plants and increases the water holding capacity of soil - a necessity with droughts and flooding that go hand in hand nowadays.
Healthy soil is the backbone of health - be it environmental, animal, plant or human health. It's our foundation and the solution to a lot of our problems.
Available again in July 2026. Sign up below to go onto the waiting list.
Skirret (Sium sisarum)
Skirret was a reasonably well known plant in Europe from the middle ages into the 19th century. It has names in many different European languages and most of them appear to translate into some variation of “sugar root”. It can be prepared similarly to carrots. We love it simply fried in some butter. It is sweeter than carrots and beautifully creamy and soft when cooked.
You will receive a seedling with some storage roots and shoots (see image further below). Simply plant into your garden as soon as you receive it and watch it emerge in spring. Growing tips are below.
Worms will be available again in August. During the wet and cold winter months, separating the worms from the castings becomes too unpleasant. Sign up below to get an email once they are back in stock.
Composting worms turn food scraps and garden waste into rich, nutrient-dense vermicast—helping regenerate soil, support beneficial microbes, and improve nutrient cycling. This creates healthier, more resilient plants and increases soil water-holding capacity, an important benefit in times of drought and heavy rainfall.
You will receive 250g (approx. 1,000 worms) or 500g (approx. 2,000 worms), supplied with moist bedding in a breathable perforated bag. Worms arrive in a mix of ages and sizes and will quickly breed and multiply under suitable conditions.
Available again in July 2026. Sign up below to go onto the waiting list.
Stachys affinis
The tubers have a distinct shape and look a bit like a grub. When eaten raw they are crisp and sweet like a water chestnut. When fried they are more starchy, soft and sweet, resembling a slightly nutty potato or kumara. In France they are known as crosnes and are typically served braised in herbs and butter, which is our preferred way to eat them. They are a great brain food.
Order is for a starter bag of about 5 tubers.
Growing instructions can be found below. Frost tolerant as they go dormant over winter.
Available again in July 2026. Sign up below to go onto the waiting list.
Rosmarinus officinalis
Native to the Mediterrannean, rosemary prefers a warm, moderately dry climate and a sheltered site. It is an upright woody herb with blue flowers. It flowers in late winter and spring and is loved by bees. It is a culinary herb with many medicinal uses (see below).
Order is for 1 bare rooted seedling.
