FAQ: General - Richgro
  • Nearest Store: Mitre 10 SUNLITE MITRE 10 PITT ST – COMMERCIAL 74 Pitt Street, SYDNEY, NSW 2000

FAQ: General

All our bags are made of recyclable material – a combination of Low Density Polyethylene (LDPE) and Linear low-density polyethylene (LLDPE) . However those type of bags have selected collection points. Check with your local council to see if they collect LDPE plastics. LDPE fall under Recycling number 4.

Not all councils accept those due to the nature of their recycling system – some bags can damage machines inside sorting facilities and even cause some machines to break down, which could prevent other materials from being recycled.

IF your council does accept these soft plastics, please ensure that you empty the contents and wash the bags before placing in any recycling bin. Many supermarkets have special plastic bag recycling bins near the customer entry. Plastic bags placed in these bins can be recycled because they don’t need to be sorted and separated from other types of recycling. Plastic bags placed in these recycling bins must be clean. Be careful to check which bags are accepted as some bins accept only the light LDPE grocery shopping bags, while others may also accept heavier plastics.

Our latest bagged products such as BLACK MARVEL Garden Compost and BLACK MARVEL Potting Mix are registered under the Redcycle program. Those bags bear the redcycle logo on the back and can be dropped off  into your nearest REDcycle collection bin and RED Group will do the rest. There are participating supermarkets all around Australia.


Granular fertiliser is not recommended for this type of application.

Liquid fertiliser is specifically made to deliver a fast-acting dose of essential nutrients enabling your plants to thrive during peak growing season.

Please follow directions on the label. It is usually advisable to dispose of the empty container by wrapping in paper, placing in a plastic bag and putting in the garbage, however directions on the label remain the best indication for the type of product.

Heat can be so incredibly harsh on the garden, however there are various easy ways to lessen the blow of the heat. Great tips are available in  “Protecting your garden from the Summer heat” by our brand ambassador and gardening expert Charlie Albone.

1 tablespoon = approx 15g
1 adult handful = approx 50g
For accurate measurement please use scales where possible.

Insecticides and fungicides are designed to protect your garden from unwanted pests and diseases. These products are designed to stop insects and by nature can unfortunately be harmful to bees. However, we at Richgro understand the importance of bees to the environment and that all gardens can benefit from the buzzing of bees and their work in pollination and of course their delicious honey.

We have formulated an insecticide as a granule which is easily sprinkled onto the ground, and watered in, thus eliminating overspray or direct contact to flowering plants. This is a much safer and less harmful way to protect your flowering plants from unwanted pests which suck the leaves and stems of the plant.

We also encourage using our natural sprays on your fruit and vegies after the flowers have started to fruit. This is when the pests will attack your crop and the bees have long since been and gone, doing their great work.

Nitrogen (N), Phosphorus (P) and Potassium (K) are the three main nutrients that plants need for healthy growth. Different plant types need them in different ratios depending on if they are fruiting, flowering or foliage plants.

Nitrogen (N)

Nitrogen helps leaves and stems grow. Deficiency symptoms appear as yellowing of older, lower leaves.

Directions for use:

No more than 100g per square metre during the growing season. Lasts up to 4 months .

As it is a fast acting organic feed, care should be taken not to apply too much especially in warm moist conditions. Water in well after application.


Phosphorus (P)

Phosphorus stimulates root growth and helps the plant set buds and give flowering a boost. It also promotes energy storage and transfer within plants. A deficiency sees purplish colouring in leaves and stunted roots.

Directions for use:

Applied during growing season at the rate of 50g per square metre and water in well.

Make sure to wash from the leaves of plants.


Potassium (K)

Potassium helps your plants during low or high temperatures and gives fruit and flowering production a boost. Deficiency produces irregular growth and brown edges on leaves. Potassium also speeds the compost process, improves drainage in heavy soils, and improves water retention in sandy soils. Deficiency symptoms include wilting of older leaves.

Directions for use:

Apply at the rate of 10g per square metre.

Ensure the surface is already damp. Spread evenly over the surface and rake into approximately 5 cm of soil. Water in well immediately after spreading.


Organic Nitrogen, Phosphorus and Potassium have little or no effect on soil PH.



As a general guide we recommend that a standard 25L bag of potting mix will fill approximately:

2 x 12’’ POTS (30cm)

3 x 10’’ POTS (25cm)

5 x 8’’ POTS (20cm)

18 x 6’’ POTS (15cm)

Although you don’t always see them, moulds are present in all gardening mixes containing composted organic matter. The white mould you may see in your potting mix is called Mycelium. Mycelium helps soil by breaking down organic matter, keeping moisture in the soil, and helping to prevent erosion. By breaking down organic matter, mycelium helps create fertile soils with healthy microbes.

Always follow the precautions noted on the bag, including wearing suitable protective clothing and gloves and wash your hands immediately after handling.


A soil wetter improves water penetration into the soil, water crystals are used to hold moisture.

Apply when needed based on the health of your plants and surrounding factors like weather, soil etc

The degree of acidity for our potting mix, soil and compost is between 5.5 and 6.5.

Early Spring, mid -Summer and Autumn or as required to maintain healthy growth.

When and how often to apply fertiliser to your plants depend largely on the type of plant you are trying to grow and the type of fertiliser used – See “Fertilising tips for your garden” by our brand ambassador and gardening expert Charlie Albone.

Fertilising your plants can be a bit confusing as fertilisers come in many different forms and compositions. They all contain nutrients that your plant can use for growth, some are complete and have all the 16 nutrients and others are for specific needs such as fruit and flower, greener lawns or an obvious mineral deficiency. There are also solid and liquid fertilisers in both inorganic and organic so it can get a bit baffling to say the least. See “fertilisers explained” by our brand ambassador and gardening expert Charlie Albone.

Life in a pot can be difficult for a plant so you need to get the best quality potting mix you can afford. All potting mixes are designed to help plants grow in pots however like most things there are levels of quality when it comes to potting mix, with the best ones having the red tick symbol on them, which is a way of letting you know they have passed a series of tests. See “Why use a premium potting mix?” by our brand ambassador and gardening expert Charlie Albone.

Well there are a few reasons – soil unlike potting mix has a mixture of sand, loam and clay and they are often not in equal measurements, in a potting mix you get the optimum combination of drainage and water / nutrient holding capacity so your plants get water without drowning. Along with this you get added fertilisers, nutrients and additional tonics like seaweed so your plants can perform in the restricted growing area of a pot.


Lawns and garden are not unlike people, in that to remain healthy and resistant to disease they need a healthy diet of nutrients and trace elements. The natural soil or garden bed does not always contain these nutrients and trace elements, as a result plants may grow slowly and become unhealthy which may make them susceptible to stress caused by extremes of weather and also disease.

Regular applications of the correct fertiliser along with a soil balanced in organic matter will reduce the likelihood of your plants becoming diseased, reduce weeds and ensure your garden always looks its best.

NPK represents Nitrogen, Phosphorus, and Potassium respectively. They are represented as mass percent; that is, the amount of the nutrient divided by the entire mass of the product. So the total is never 100%.