How Fast Does Photinia Grow? Fertiliser & Growth Tips for Dense Hedges

Photinia is known as one of the fastest-growing hedging plants in Australia. Under good conditions, varieties like Red Robin can grow 30–60 cm per year. With proper feeding and care, hedges reach full height quickly and stay dense and bushy.

Average Growth Rates

Growth speed depends on climate, soil, and care, but generally:

First year: Establishes roots, slower growth of 20–30 cm.
After establishment: 30–60 cm per year in height and spread.
Mature hedges: Grow vigorously after each pruning if fertiliser is applied.

Without fertiliser support, Photinia often grows at half this speed, with fewer red flushes and patchier foliage.

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Feeding for Strong Growth

Photinia’s reputation for fast growth only holds true when nutrients are available. Heavy feeding is needed to sustain repeated flushes of red foliage. Fertiliser directly influences both growth rate and hedge density.

Nitrogen: Produces vigorous green leaves that support quick growth.
Phosphorus: Strengthens roots to anchor fast-growing hedges.
Potassium: Improves colour in red shoots and keeps foliage resistant to leaf spot.

Regular liquid feeding every 4–6 weeks during spring and summer keeps Photinia in active growth. Trimming followed by fertilising encourages another flush of red shoots, making the hedge grow thicker and faster.

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Why Photinia May Grow Slowly

If your Photinia hedge is not growing as fast as expected, the causes are usually:

Poor or depleted soil without fertiliser support.
Shade reducing the plant’s energy for growth.
Water stress, especially in shallow-rooted young plants.
Over-pruning without following up with fertiliser.

The best way to maintain speed and density is consistent feeding. Complete Grow All Purpose Liquid NPK 20-20-20 supplies balanced nutrition, keeping growth steady and flushes vibrant throughout the year.

FAQ – Photinia Growth Speed

How fast does Photinia grow in Australia? Around 30–60 cm per year once established.

Does fertiliser make Photinia grow faster? Yes, regular feeding significantly increases growth rate and density.

Why is my Photinia growing slowly? Usually due to nutrient deficiency, shade, or water stress.

How tall can Photinia Red Robin grow? Up to 3–5 metres if left untrimmed, but usually kept as a hedge at 2–3 metres.

What fertiliser is best for fast growth? A balanced liquid NPK like Complete Grow 20-20-20 provides the nutrients Photinia needs for quick, healthy growth.