Native to the mountain ranges of central Asia, the common Walnut is a slow growing, deciduous, medium to large tree that can attain a height of 20m with a trunk diameter of 2m. The bark is a smooth, silvery grey and is ideal wood for making furniture due to its texture and exceptional stability. The trees have yellowish green large leaves, producing both male and female flowers in the spring followed by clusters of walnut fruits. The large edible, oil rich and crispy nut kernel that turns dark brown when ripe, is contained within a hard shell that is enclosed in a solid green husk.  The thick outer green husk must be removed in order to reach the hard inner shell of nut.

  • Plant & Growing Tips:

    Is best suited to cool and cold climates.

    Provide a full or partial sun location.

    Will thrive in loamy soil with good drainage and a pH balance that is neutral to slightly alkaline. Otherwise, walnuts will do well in virtually any soil as long as it is well draining.

    Mature trees are quite frost hardy, but young plants and new spring growth is susceptible to frost damage.

    Shelter from hot, dry winds.

    Water deeply twice a week during the weeks where there is no rain during the growing season.  Otherwise once a week will suffice as established walnuts are fairly tolerant to drought.

    In dryer regions, apply a layer of organic mulch around the walnut but do not build up against the trunk of the tree.

    Plant in spring to allow seedlings time to establish a good root system before winter. Ensure planting after danger of late freezes.

    When planting, prepare a hole that is twice as large as the root ball of the sapling.

    Generally plants are spaced 16m x 16m. However, plants can be much closer together at 6m between rows and 3m apart within the rows.

    Walnut trees must be planted away from any other plants as the fallen leaves and husks contain a dark brown chemical (Juglone) that acts as a natural herbicide. It is also toxic to many animals and fish.

    Plant more than one walnut tree to ensure good cross pollination to produce walnuts.

    For home gardeners prune your walnut tree for dead, weak or diseased branches only. The tree does not need to be cut back unless it is making contact with other structures. Commercial growers may prune mechanically to maintain as hedgerows.

  • Fertiliser Applications:

    Stage: Young Trees

    Product: Dinofert Organic Fertiliser, Dinofert Standard Pellets

    Gardener Use: 1½ -3¾ (250-750g)

    Commercial Use: 300g – 900g

    Comments: In the years before the tree starts bearing fruit, fertiliser in early summer and again at the start of autumn. Scatter around the drip line and do not place directly against trunk. Increase the amount in each subsequent year until the tree begins to bear fruit. For example – start with 250g for the first year and slowly progress up to a maximum of 750g.


    Stage: Fruit Bearing

    Product: Dinofert Organic Fertiliser, Dinofert Standard Pellets

    Gardener Use: 3¾-10 (0.75-2kg)

    Commercial Use: 1 - 2.5kg

    Comments: Apply in a light band around the base of the planting site. Fertilise plants in spring, summer and autumn. Walnuts will also grow vigorously, producing better yields when given regular applications of nitrogen rich fertilisers in conjunction with pelletised organic poultry manures.



Please note that the above information and recommendations are provided in good faith and are given without liability for loss or damage suffered as a result of their application. Optimum response to fertilisers will only be achieved when weeds, insect pests and diseases are controlled and adequate soil water is available.

Fertiliser use recommendations are presented as a practical guide to good agronomic practice under most situations. Local soil, climatic and other conditions should also be taken into account as these could affect plant response to fertiliser rates and applications.

For further information we recommend you seek advice from your local agronomist.