Avenue tree cultivation focuses on growing varieties of trees that are suitable for planting along avenues, roads, streets, but also in parks and gardens. The trees are typified by their characteristic upright shape. This is achieved by training and pruning the trees during the initial years to obtain a branch-free lower trunk, good secondary growth and a full crown.

Select a stage for more information

Stage 1 Cultivation preparation
Stage 1

Cultivation preparation

In this stage, we advise applying humic acid and boron as shortly as possible before or during planting. Humic acid has a positive effect on the availability of nutrients in the soil and stimulates root development. Boron is also important for good development and numerous other processes. Optima Soil Humi-B* is a pure humic acid with 2.3% boron.

Advice in this stage:

Soil application 1 x - Optima Soil Humi-B*: 30 litres/ha

* Unfortunately, only available and applicable in the Netherlands.

Stage 2 Planting
Stage 2

Planting

To promote the establishment of the young trees, the soil must be thoroughly moist. This promotes root development and the availability of minerals. Optima Root stimulates the plant in producing a good root system and promotes establishment of the young tree.

Advice in this stage:

Foliar application 2 x - Optima Root: 10 litres/ha (every 4 weeks)

Stage 3 Coming into leaf
Stage 3

Coming into leaf

After a period of dormancy, trees start to come into leaf again every year during spring. The formation of flower buds and new leaves requires a proper uptake of minerals. An important aspect of this is also the availability of minerals. You can apply these minerals effectively using a foliar fertiliser. The application of the Nutri-Key leaf fertiliser range is recommended.

In the initial phase of the growth, the focus is on optimal leaf development and chlorophyll production. Nitrogen, magnesium, manganese and iron, in particular, are important here to optimise the photosynthesis capacity, leaf and branch development and the final secondary growth. With Optima Leaf NPK+ and Optima Leaf Trace, you can apply a well-balanced combination that includes nitrogen, magnesium, manganese and iron.

Advice in this stage:

Foliar application - Optima Leaf NPK+: 4 litres/ha (every 14 days)

Foliar application - Optima Leaf Trace: 1 litre/ha (every 14 days)

Stage 4 Leaf development
Stage 4

Leaf development

In the initial phase of the growth, the focus is on optimal leaf development and chlorophyll production. Nitrogen, magnesium, manganese and iron, in particular, are important here to optimise the photosynthesis capacity, leaf and branch development and the final secondary growth.

With Optima Leaf NPK+ and Optima Leaf Trace, you can apply a well-balanced combination that includes nitrogen, magnesium, manganese and iron.

Advice in this stage:

Foliar application - Optima Leaf NPK+: 4 litres/ha (every 14 days)

Foliar application - Optima Leaf Trace: 1 litre/ha (every 14 days)

Stage 5 Secondary growth
Stage 5

Secondary growth

In this phase, the focus is on keeping the leaf green and maintaining chlorophyll production for as long as possible. Nitrogen, magnesium, manganese and iron and trace elements, in particular, are important here to optimise the photosynthesis capacity, leaf retention and branch development and the final secondary growth. With Optima Leaf Ca*, Optima Leaf Mg* and Optima Leaf Trace you can apply a well-balanced combination with nitrogen, calcium, magnesium and trace elements.

Advice in this stage:

Foliar application - Optima Leaf Ca*: 1 litre/ha (every 14 days)

Foliar application - Optima Leaf Mg*: 1 litre/ha (every 14 days)

Foliar application - Optima Leaf Trace: 1 litre/ha (every 14 days)

* Unfortunately, only available and applicable in the Netherlands.

Stage 6 Hardening off
Stage 6

Hardening off

Towards the end of the growth season (end of August/early September), the focus is on accumulating reserves in preparation for winter. The so-called hardening off process begins. The transport of minerals from the leaf to the trunk and the side branches demands extra availability of potassium. To supply sufficient potassium at the end of August/early September, Soiltech developed the foliar fertiliser Optima Leaf-K. The product contains easily available potassium in a high concentration (28% K2O). Optima Leaf-K promotes secondary growth and increases the hardiness of the crops.

Advice in this stage:

Foliar application 3 x - Optima Leaf-K: 5 litres/ha (every 14 days)

Stage 7 Leaf drop
Stage 7

Leaf drop

As soon as the natural process of leaf drop has started, it is recommended to promote it. Applied in high concentrations, the copper foliar fertiliser Optima Leaf Cu has the side effect of accelerating leaf drop in autumn. Spraying the leaves of dry trees during sunny weather benefits the desired result. Take care to time this treatment well – only start foliar application when 10% of the leaves have dropped. Treating too early with Nutri-Keu Copper Shuttle will stop transport of reserves for winter hardiness prematurely.

Advice in this stage:

Foliar application 1 x- Optima Leaf Cu: 4 litres/ha

ATTENTION! this dosage deviates from the standard dosage of our Optima Leaf products.