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Green Harvest Organic Gardening Supplies is permanently closed as of 5pm on 1-11-2023.
We will not be taking orders by this website, in person, by phone or email. Our display garden and retail shop are closed forever.

Phone:07 54357000
Phone calls will only be responded to sporadically and only in reference to orders placed prior to 2-11-2023. All the useful growing and organic pest management research and resources are available on this website for a while still.
Biodynamic Soil Activator   Biodynamic Tree Paste   Instant Humus   Life Force Gold   Natrakelp   Seaweed Plant Starter   Trace Element Mix   Tri-Kelp Soluble   Worm Hit Fertiliser  
Important reasons to choose organic!
  • Organic fertilisers are of benefit to the soil, not just the immediate crop.
  • Natural products based on kelp, rock minerals, fish and animal manures have a slow release.
  • Chemical fertilisers are highly soluble so may wash into the waterways causing toxic algal blooms.
  • The fast, lush growth caused by chemical fertilisers also attracts pests and fungi to the plants.
More information on soil pH...
More information on organic soil improvement...
Biodynamic Soil Activator
Our Soil Activator is a great natural/biological resource to kick start any garden. It is particularly excellent to use on dry, depleted soils or severely degraded or out-of-balance areas. This all in one pack contains the biodynamic preparations 500-508.
  • creates a healthy balance in the soil
  • enhances the breakdown of organic matter
  • attracts beneficial fungi, bacteria and earthworms
  • an excellent soil builder
  • Contents:
    • Composted Cow Manure, Horn Manure (500), Horn Silica (501), Compost Preparations 502-507, Equisetum (508), Winter Horn Clay, Horn Basalt, Crushed eggshells and Basalt Dust
    • Preparation 500 enlivens soil by improving soil structure and microbiological activity and promotes humus formation and water holding capacity
  • Usage and coverage:
    • only needs to be rhythmically stirred with water for 20 minutes as it is pre-stirred twice during its manufacture, a form of potentization
    • stirring is quite easily done by hand for small areas and lends itself to home garden situations
    • full instructions included
    • application rate is 15 g per 1000 square metres (quarter acre)
    • 30 g pack allows two applications for most home gardeners
    • buy more and save for larger or more frequent applications
Biodynamic Tree Paste
  • A dynamic healing massage paste for your woody plants (roses, fruit trees, grape vines and others).
  • Provides nutrients through the bark.
  • Discourages the growth of fungi, lichen, scale and borers, from damaging the trunk or sheltering amongst crevices in the bark.
  • Reduces transplant shock, promotes wound healing (from pruning or storm damage).
  • Stimulates root growth prior to planting by dipping the plants into a thinned paste.
  • Apply by hand or paint the stem, branches and trunk.
  • Can be diluted to a very thin consistency, strained and sprayed on dormant trees.
  • Made up of clay, biodynamic cow manure, biodynamic manure concentrate, which includes the compost preparations, diatomaceous earth, fine basalt dust, horn manure 500, raw linseed oil, fermented equisetum, stinging nettle tea and biodynamic seaweed concentrate.
  • Use within 12 months or if longer remix with clean water.
  • Store in a cool, dry place.
  • Coverage is dependent upon: size and number of plants, dilution you choose.
  • 1.2 kg resealable bucket.
Life Force Instant Humus OG certified product for organic gardens
A concentrated soluble humic acid granule that provides the many benefits of humus to soils with low levels of organic matter (most of Australia) and can be used as a substitute for compost. Humic acid promotes root growth, mineral and water retention and neutralises toxic residues and heavy metals. Apply to lawns, flowering plants, vegetables, shrubs and fruit trees. Dilute 2 teaspoons into a 9 litre watering can and wet soil thoroughly; covers 4 m˛; repeat monthly. 1 kg.

Life Force Gold
A complete composted fertiliser and soil conditioner containing all major minerals and micro-nutrients as well as billions of beneficial microbes. Ideal for your vegetable gardens, fruit trees, lawns, ornamental gardens and pot plants. Feed fruit trees in spring; feed vegetable and flower crops every 3 months. Used after the wet season it will replenish the leached nutrients. Sprinkle around existing plantings or blend into the topsoil for new planting areas. Apply: 200 grams per m˛ of garden bed; for pots use 15 grams per litre of potting mix. 3 kg bag.

I just wanted to drop you a quick line to let you know how delighted I am with the Backyard Bloom (Ed. now called Organic Blooms) fertiliser. I have been using it fortnightly on my bean plants and am having a wonderful result. Before I used to use 'flower and fruit' products because I could never find an organic high potash liquid. I will be using it with all my flowers now as well as my tomatoes!
Kristine of Wallsend NSW
Natrakelp OG certified product for organic gardens
Green Harvest has been supplying this Australian certified organic kelp product since 1998. Although it is not readily available to the retail market and there is not a big budget promotions campaign aimed at the gardener, this kelp is used by organic farmers internationally and many Australian scientific studies verify its success in the field in increasing yield. It uses Tasmanian seaweed in a cold-press process. Kelp contains a comprehensive range of trace elements and amino acids essential to maintaining an organic garden. Use it to:
  • soak seed, seedlings and new fruit trees to reduce transplant stress,
  • increase fruit production by foliar spraying,
  • increase tolerance to heat, cold, drought, pests and diseases.
Depending on application rate, 1 litre makes up to 250 litres; 5 litres makes up to 1250 litres.


We also have available a Natra-Kelp Liquid Seaweed For Animals
Seaweed Plant Starter
Get your seeds, seedlings and cuttings off to a flying start with this seaweed concentrate made from organically certified Tasmanian Bull Kelp. Contains naturally occurring plant hormones for stimulating seed germination and early root growth. Dilute 1 capful (10ml) in 4 litres of water and use to soak your seedlings when transplanting; soak seed in ˝ a teaspoon of seaweed solution mixed with 500ml of water; dip cuttings into a 10ml in 100ml of water solution. Can also be used as a foliar spray.
Depending on application rate, this handy-sized 500ml bottle makes up to 200 litres of fertiliser solution.

TS146Reduced from $17.95
Trace Element Mix OG certified product for organic gardens
Trace element deficiencies in plants are hard to diagnose without lab testing as multiple deficiencies often occur simultaneously, especially after major rain events or in sandy soils.
This concentrated, balanced certified organic blend of micro-nutrients allows you to apply all the significant trace nutrients lacking in most fertilizers and Australian soils, without the necessity and expense of a soil analysis test.
Micro-nutrient deficiencies in the soil are common and widespread with likely symptoms to include:
  • yellowing or disfiguration of leaves
  • stunted growth
  • poor plant and vegetable quality
  • restricted nutrient uptake
  • shedding of flowers and fruit
  • low plant vigour

Trace Element Mix ensures critical trace element availability including:
  • iron
  • boron
  • cobalt
  • copper
  • manganese
  • zinc
  • molybdenum
  • silicon
  • potassium
  • magnesium
  • sodium
  • calcium
  • carbon

Apply as a foliar spray or soil drench at 10 ml per litre when deficiency symptoms occur to all veggies, lawns, fruit trees, natives, etc.
Size: 1 Litre bottle makes a minimum of 100 litres

Tri-Kelp Soluble OG certified product for organic gardens
Soluble Organic Seaweed Powder for plants
Different kelp species have unique effects upon plant health and crop potential depending upon their nutrient and hormonal profile. Tri-Kelp offers a unique formulation of three seaweed species: Laminaria, Sargassum and Ascophyllum nodosum.
This Australian Certified Organic product is produced in a unique freeze-drying process which increases surface area and aids rapid dissolvability. This 100% soluble dry powder seaweed mix is very economical, using only 1 gram per 1 litre of water.
  • (ACO) Registered Farm Input 456AI
  • rich in alginic acid, the main ingredient which is stripped out of all brands sold in major hardware chains
  • can improve soil conditions and enhance water retention by promoting beneficial soil microbes
  • improves both growth and flowering and is a powerful anti-stress tool
Application rates:
  • Foliar Spray: Vegetables, Orchards, Ornamentals, Natives, Pasture and Turf: 1 kg makes up to 1000 litres
  • Use to root cuttings and water in new seedlings at 1 gram per 1 litre of water

Worm Hit Fertiliser OG certified product for organic gardens

Worm Hit Pellets
A powerful soil-enhancing organic fertilizer, rich in key minerals and nutrients. Produced by earthworms and formed into clean, easy to use pellets.
  • Made from worm castings that contain beneficial soil micro-organisms
  • Easily incorporated at planting
  • Improves soil structure
  • Builds soil carbon storage
  • Increases soil water retention
  • Boosts plant growth, yields and quality of produce
  • 100% natural and certified organic
  • Activates with water
  • Application: 1 kg / 100 m² for lawns and veggie gardens

Worm Hit Bricks
This Australian produced worm product is a slow release biological fertiliser compressed into a 1.2 kg brick, cleverly designed to be easily broken in half. The 2.4 kg carton has 4 blocks to work with.
  • full of beneficial, healthy soil micro-organisms including bacteria, fungi, protozoa and nematodes
  • these are all of the 'good guys' that transform nutrients within the soil from inorganic forms to organic forms to facilitate plant nutrient uptake
  • this leads to healthy crops, trees or plants with improved growth and yield
  • they are perfect for new plantings and any tree to help turbo boost the rhizosphere helping your plants establish healthy root systems
  • Application: break brick along perforation and add half in the tree hole at planting. Backfill with soil. Apply half a brick to the soil surface at the base of the tree each season
How do you decide which fertiliser to use?
For gardeners with large areas, planning new orchards or market gardening, a soil test is essential. It gives you a starting point to judge your soil's improvement over the years and identifies initial problems that have to be addressed. Without the information from a soil test, large sums of money can be wasted on inappropriate fertiliser applications or young trees lost due to nutrient deficiencies.
For home gardeners it is hard to go wrong just adding compost to the soil, with organic seaweed or fish fertiliser to help seedlings along. Organically certified fertilisers such as NTS Instant Humus and Organic Link can safely be used in any gardening situation. Soils vary a great deal from region to region, in some areas of Australia soils are low in magnesium whereas SE Queensland is the reverse, often far too high in magnesium but low in calcium. As a general rule Australian soils are deficient in trace elements which is why a seaweed spray such as Natrakelp is a useful addition.
Checking with a local organic gardening organisation will give you the benefit of the members long experience and understanding of your area's climate and soils. See our links page for websites.
Why buy organically certified fertiliser?
English is a constantly evolving language and changing all the time. Many words have several meanings and 'organic' is one of these. 'Organic' meaning carbon-based is one meaning used as the opposite of inorganic. Grown without the use of chemical fertilisers and pesticides is simply another meaning, that has developed semantically since the early 1900's. This is obviously a valid meaning as the function of language is communication and this meaning is understood by millions of people world-wide.
Organically certified fertilisers are those where the original materials and the processes to manufacture them have been audited by an organic certifying organisation. This means that tests are done for heavy metal residues and chemical residues such as fungicides. To give an example, gypsum mined as rock could be available 'organically certified'; gypsum as a waste product from gyprock manufacture with residues including fungicides could not be 'organically certified'.

More information on soil pH...
More information on organic soil improvement...
Meets National Organic Standards - products with either ingredients permitted for use in organic farms or acceptable cultural strategies for pest control. This standard is detailed in the Australian Certified Organic Standard (ACOS) 2010 as defined by Standards Australia. Organic growers should always check with their own certifying organisation for the acceptability of any product.
OG Organic Certification for Australia
FG Food Grade
UT Untreated Seed or Plant
Green Harvest Organic Gardening Supplies is permanently closed as of 5pm on 1-11-2023.
We will not be taking orders by this website, in person, by phone or email. Our display garden and retail shop are closed forever.

Phone:07 54357000
Phone calls will only be responded to sporadically and only in reference to orders placed prior to 2-11-2023. All the useful growing and organic pest management research and resources are available on this website for a while still.
No liability will be accepted by Green Harvest, its owners or employees as to the accuracy of any information. No responsibility will be taken for damage to property or persons due to information given about a product or technique. No responsibility will be taken for the loss of a crop or income due to information given about a product or technique.
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