Got a query? call us on 01905 888 098


FREE UK Mainland delivery for All Tree Orders
(excluding 50 litre pot size and above or trees taller than 3.00m, or Highlands and Islands - contact us
for a quote)

Got a query? call us on 01905 888 098

(Excluding Highlands and Islands and
50 litre pots and above or trees over 3.50m tall (inc the pot),

unless specifically advertised on the product page
For the above - Contact us for a quote)

We are RHS Master Growers

We are at the RHS Malvern Spring Festival 7th May- 10th May 2026
where we are very pleased to have been awarded another GOLD medal

25% off selected Trees In our Black Friday/November Specials List (See home page),
20% off All other trees by using voucher code 'November20' on the basket page
and FREE Delivery on all tree orders to UK mainland addresses.
Offers end 30th November 2025 and while stock lasts.

High K Fertiliser and Alg-A-Mic Seaweed with Pine Bark Pot Topper

£28.38

High K Fertiliser and Alg-A-Mic Seaweed Dream Team with Ornamental Pine-Bark Pot Topper Mulch

The professional’s choice of soluble high potassium fertiliser for hardy, sturdy growth

Alg-a-Mic Seaweed provides a soothing treatment for Roots and Shoots especially in hot weather.

Smart-looking Mini Pine Bark to mulch your pots

FREE SHIPPING – no additional costs to get this Dream Team to your door provided you live in mainland England, Wales and Industrial Scotland.  Highlands and Islands may incur additional costs – please enquire.

Sizes quoted are approximate height bands of the tree above compost level, ie. height of tree once planted into the ground.
N.B. Photographs shown are typical representatives of the varieties we grow, Please contact us if you require a photograph of a particular tree.
Also, Eucalyptus are living plants and can grow almost all year round, occasionally we may supply you with a plant that is slightly taller than your order. If this might cause you problems, please include a note with your order.

Click the dropdown below to view our different sizes & prices or if no alternative options are available, just press 'Add to Basket'

In stock

REF: HIKSEAnPine
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Description

High K Fertiliser and Alg-A-Mic Seaweed Dream Team with Ornamental Pine-Bark Pot Topper Mulch

This is the ideal summer booster combination for your Eucalyptus trees (and most other flowering or fruiting plants!).

This combination kit contains

  • 1 x 750g pack of High K  Soluble Fertiliser – enough for 750 litres of solution when diluted as recommended
  • 1 x 500ml bottle of Alg-A-Mic Seaweed Extract
  • 5 litres of Ornamental Mini Pine-Bark Chip ideal for mulching and dressing the top of your pots, to help conserve moisture and keep the compost in good condition.
Soluble High K Fertiliser: Tree Food Please note that this product can be used on Eucalyptus that are planted in the ground and grown in containers

Why use the High K Fertiliser and Alg-A-Mic Seaweed Dream Team with Ornamental Pine-Bark Pot Topper Mulch?

Professional grade soluble plant fertiliser with the ideal nutrient make up for Eucalyptus trees. Essential for happy container-grown Eucs in patio pots and also great for giving a boost to Eucs grown in the ground.

The special formulation allows the full range of nutrients to be available to the plant even in areas with hard water. Hard water can be problematic as it has a tendency to make iron and other trace elements, vital for correct plant metabolism, less accessible by ‘locking them up’ in insoluble compounds.

Eucalyptus High K is as safe and easy to use and store as any other soluble plant fertiliser.

Professional grade soluble plant fertiliser with the ideal nutrient make up for Eucalyptus trees. Essential for happy container-grown Eucs in patio pots and also great for giving a boost to Eucs grown in the ground.

The special formulation allows the full range of nutrients to be available to the plant even in areas with hard water. Hard water can be problematic as it has a tendency to make iron and other trace elements, vital for correct plant metabolism, less accessible by ‘locking them up’ in insoluble compounds.

Eucalyptus High K is as safe and easy to use and store as any other soluble plant fertiliser.

For full instructions on ‘How to Use’  – Hop over to the next tab to see Dosage and Rate of Use.

At Hardy Eucalyptus, we have been using Eucalyptus High K in the nursery by the tonne and are thrilled with the results.

Why use this product as opposed to other readily available plant fertilisers?

Eucalyptus High K has the specific,  correct formulation to keep Eucalyptus happy.   Not too much Nitrogen, very low in Phosphorus, high in sensible Potassium.

The formulation: 13:10:28+2MgO+TE where the 13:10:28 refers to N:P:K: ratio.  2MgO is the level of Magnesium and  TE stands for trace element.

Nitrogen ( N:13) is for shoots and leaves.  Eucs love nitrogen, but like me and chocolate – we should only be allowed to consume it in small quantities.   Nitrogen is like crack cocaine to a Eucalyptus. Over do the Nitrogen with a Euc and it becomes sick and falls over – literally.  Nitrogen results in fast and furious growth, which is unsupported and sappy.  The tree has no means of supporting this summer season growth until November (due to its complex biology) and so it falls over.  This sappy growth also compromises winter hardiness, leaving your tree at risk of extreme frost damage.  Eucalyptus only require a small amount of nitrogen to be happy.

Phosphorus (P:10) is for roots: Australia is a land of impoverished soils with very little phosphorus, so Eucs don’t really know what to do with it!  Put it this way, they are reputedly not keen on it.

High potassium (K*)  (K:28) is traditionally known for flowers and fruits, but it also has many other functions to perform with in a plant.

Potassium is the first aid kit; in that it helps the plant to fight off diseases.

Potassium also regulates osmosis (water-flow) throughout the plant; this is important under drought conditions where plants can suffer drought-stress.  Furthermore, and especially in Eucalyptus, Potassium helps the tree ripen its tissues in readiness for winter. It is like a frost-proofer.

*K from the Latin Kalium – derived from the Arabic word al-qalyah (alkali), meaning plant ashes.  In English, potash was manufactured from wood fire ashes in pots.

Magnesium is important as it is at the centre of the Chlorophyll molecule – the green stuff in plants that converts sunlight into chemical energy,  which in turn, helps to build plant material, amongst other things.

High K contains a good range of trace elements TE (think plant equivalent of vitamins) in a slow release format – see the next tab for a full list, but these elements such as Boron, Molybdenum etc. all have specific jobs to carry out with in a plant to keep it healthy and functioning correctly.

Eucalyptus High K is a multi-purpose product; you can use this plant food in Spring & Summer to feed your roses, Japanese maples, flowering and fruiting trees and shrubs, and even on lawns in the Autumn.

Hardy Eucalyptus have successfully used Eucalyptus High K to feed a range of potted plants including Lemon trees, House plants, potted fruit trees and a range of perennials, with great results

High K Fertiliser is of particular importance if you are growing in plants in containers and also if you’re pruning them regularly.  Standard specimen Eucalypts don’t require feeding once established, but if you are harvesting a crop of foliage or regularly pruning a bushy Eucalyptus, both actions of which remove stored collateral*, then your trees require plant food.  Frequent removal of vegetation without feeding will lead to Euc-exhaustion!

*Stored collateral in a plant means the woody stuff, where the plant has laid down woody fibre which contains carbon. When you prune a plant and remove that live material, you are effectively making a withdrawal from its plant ‘bank account’.  Make this withdrawal on a regular basis without putting back plant food in some form and you run the risk of exhausting and killing your plant 😟

And it’s a ‘team effort’.  High K Fertiliser works in combination with the contents of the Alg-a-Mic seaweed Fertiliser and also your plant’s mycorrhizal fungi to provide sustained nutrition during the growing season, in the correct proportions to encourage healthy plant growth.

High K Fertiliser is a multi-purpose product; you can also use this plant food in Spring to feed your roses, Japanese maples, flowering trees and shrubs, and even on lawns in the Autumn.  Hardy Eucalyptus have successfully used High K Fertiliser in a flower cutting garden with great results.

Packaging is completely compostable, including the ziplock. Please put it in your compost heap or green waste bin after use. Composition: “Eco Kraft paper”, bio-cellulose film, starch zip.

The other half of the Dream Team Duo – Alg-a-Mic Seaweed

Cold-pressed Seaweed is an amazing product, packed with nutrients, plant growth hormones and ofcourse soothing Alginate, which coats your plant’s leaves and keeps them in good condition; not only looking beautiful, but also able to make more plant food.

Review our Alg-a-Mic Seaweed Guide here to get the full details about this product.

Pine-Bark Mini Chips – the third one in the trilogy!

An excellent product for mulching the top of your pots: in addition to looking smart, it keeps the compost, root fungi and Euc-roots happy, conserves moisture and helps keep fertilisers available to your plants.

4 litres should be sufficient to mulch up to an Air-Pot container up to 20 litres in size.

Additional information

Weight 3.9 kg
Dimensions 30 × 21 × 7 cm

Happy Plants

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