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Fertiliser Basics & When to Feed

Published

September 3, 2025

Author

The Searles Gardening Team

Searles Garden Products shares expert advice on fertiliser types, timing, and nutrient matching. Learn when to feed, how to choose the right N-P-K balance, and practical tips for healthy, productive plants year-round.

Searles Garden Products presents a concise guide to nourish your garden. Understanding fertiliser essentials and timing feeding for optimal growth. Fertilising isn’t guesswork, it’s a strategy. This article explores types of fertilisers, when to apply, and how to match nutrients with plant needs. It’s designed for gardeners who expect strong results and dependable advice.


Key Takeaways

  • Understand different fertiliser types: granular, liquid, controlled‑release
  • Feed at key plant stages: establishment, flowering, fruiting
  • Adjust timing by climate and season
  • Match analysis to plant requirements (N‑P‑K ratios matter)
  • Always follow directions on trusted fertiliser products


Understanding Fertiliser Types and How Each Functions


Granular & Pellet Fertilisers
Granular organic formulas, such as 5 IN 1 Vegetable & Garden Organic Fertiliser, provide extended nutrient delivery and are ideal for soil mixing at planting time. Pellet options nourish gradually and reduce the risk of nutrient burn.


Liquid & Hose-On Feeds
Liquid fertilisers, including 5 IN 1 Organic Fertiliser Hose-On, deliver nutrients immediately through foliage and root uptake. These are best applied every 1–2 weeks during periods of active growth.


Controlled Release
Engineered granules release nutrients over time, making this type suitable for long-term feeding with minimal re‑application. This type is especially effective for lawns or low-maintenance garden beds and potted plants.


When to Apply: The Seasonal Guide


At the Planting or Seeding Stage
To plant seeds and seedlings, plant in an already enriched mix with fertiliser. This early step enriches the soil with vital nutrients that support the first stages of plant growth. A well-prepared soil base gives young plants the strength to establish quickly, setting a solid foundation for healthy root development and balanced growth throughout the season.


Establishment Phase (3–4 Weeks After Planting)
Once plants have settled into the soil and new growth begins to appear, introduce a liquid fertiliser. Regular feeding during this stage helps the roots expand deeply and strengthens the plant structure. Consistent nutrition in these early weeks also prepares the plants to cope better with environmental stress and ensures that leaves and stems develop with vigour.


Flowering & Fruiting
When plants reach the flowering and fruiting phase, nutritional needs change. Potassium-rich fertilisers, such as liquid potash, become essential at this point. Applying these nutrients improves the quality and size of fruits and encourages a longer blooming period for flowers. This focused feeding ensures plants direct energy towards producing abundant flowers and healthy crops.


Seasonal Adjustments
Fertilising practices should shift with the seasons. In cooler months, growth slows, so slow-release fertilisers are beneficial as these supply nutrients gradually while maintaining soil activity. Warmer months, on the other hand, bring faster plant growth, and liquid fertilisers become a key support during this time. Adjusting the feeding routine according to climate and seasonal conditions allows plants to grow steadily all year round.


Nutrient Matching: Feed Smart

  • Different plants have different nutrient needs. Leafy greens rely on nitrogen (N) for strong leaf growth, flowering plants need phosphorus (P) to form healthy roots, and fruiting crops depend on potassium (K) for quality fruit and overall strength. Matching the fertiliser to these needs helps plants grow with better balance and performance.
  • Over‑fertilising does more harm than good. Too many nutrients upset soil balance, reduce good microbes, and can damage roots. Feeding in the right amount, at the right time, keeps soil healthy and plants flourishing.


Practical Steps for Garden Success


Measure Accurately
Fertilisers are most effective when used in the right amounts. Always read the instructions on the label and measure carefully. Overuse can damage plants, while underuse may leave plants without enough nutrients to grow well.


Water Appropriately
Ensure the soil is moist before feeding. Watering beforehand helps nutrients absorb more evenly into the soil, reducing the risk of fertiliser burn and ensuring that roots can take up the nutrients required.


Mulch After Feeding
Once fertiliser is applied, a layer of mulch over the soil helps hold moisture, protects roots, and keeps nutrients from washing away too quickly. This step creates a more stable growing environment for healthy, strong plants.


Tools & Products Worth Noting



5 IN 1 Organic Fertiliser (Dig‑In)This balanced organic mix is designed to be worked directly into the soil. It provides a rich blend of organic matter and nutrients that improve soil structure while feeding plants steadily over time. It is well-suited for enriching garden beds, vegetable patches, and new planting areas to create a strong foundation for long-term growth.



5 IN 1 Organic Fertiliser Hose‑OnThis liquid fertiliser offers an easy way to provide quick nutrition to plants. It can be applied using a hose or watering can, making it convenient for both small garden beds and larger areas. Its liquid form delivers nutrients directly to roots and foliage, supporting fast uptake during active growth periods.



Liquid PotashThis potassium‑rich liquid fertiliser is especially useful when plants are in the flowering or fruiting stages. Regular applications help promote larger, more vibrant blooms and improve the quality and yield of fruiting plants. It also strengthens plant tissues, making plants more resilient to environmental stresses.


Conclusion


Fertiliser basics and strategic feeding timing are critical to maintaining healthy, vigorous gardens. Utilising premium options such as organic fertilisers, liquid feeds, and other quality garden products, along with an understanding of seasonal needs, ensures the best results. For tailored guidance or product recommendations, get in touch with us for support at every stage of the garden journey.


FAQs


1. When is the best time to feed garden plants?


Feeding is most effective at planting, during active growth, and throughout the flowering and fruiting stages. Seasonal adjustments are often needed based on climate and plant conditions.


2. How often should fertiliser be applied?


Granular fertilisers are generally applied 10 days after planting, so any damaged roots have time to heal. Liquid fertilisers are generally applied every one to two weeks during periods of strong growth.


3. Can the same fertiliser be used for all plants?


Not all plants have the same nutritional requirements. Balanced N‑P‑K fertilisers suit many general purposes, while potassium‑rich products are better suited to flowering and fruiting plants.


4. Is feeding recommended during winter?


Feeding can still be done during winter, but in a lighter form. Gentle liquid feeds help maintain root health even when above‑ground growth slows in cooler weather.


5. What happens if too much fertiliser is applied?


Excess fertiliser can harm plants. It may burn roots, upset soil biology, and lead to nutrient loss through run‑off.


6. Can fertiliser be applied to leaves?


Some liquid fertilisers can be sprayed directly on leaves. Always check the product instructions to ensure that the method is safe for the plant type.

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