Best Organic Flower Fertilisers of 2026

Toby Butcher Avatar
Toby Butcher
Last Updated: 5 Feb 2026

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Organic Flower Fertilisers are an excellent option for those who want to grow beautiful and healthy flowers without using harsh chemicals. These fertilisers are made from natural ingredients, such as bone meal, blood meal, and seaweed, which provide essential nutrients to plants. They are also environmentally friendly, as they do not harm the soil, water, or wildlife. Organic Flower Fertilisers are easy to use and can improve the growth, colour, and flavour of flowers. With many options available on the market, it is advised to research and compare different brands to find the best one for your garden.

At a Glance: Our Top Picks

Organic Baby Bio Liquid Houseplant Food 175ml Cover #TOP 1
Organic Baby Bio Liquid Houseplant Food 175ml
ftb score rating icon 9.8
Vitax Q4 All Purpose Plant Food, Fertiliser Enriched With Organic Nutrients Cover #TOP 2
Vitax Q4 All Purpose Plant Food, Fertiliser Enriched With Organic Nutrients
ftb score rating icon 9.7
Will & Al's Bloom Organic Plant Fertiliser Cover #TOP 3
Will & Al's Bloom Organic Plant Fertiliser
ftb score rating icon 9.5

Top 6 Organic Flower Fertilisers

#TOP 1

Organic Baby Bio Liquid Houseplant Food 175ml

86601610
Organic
Pack of 1
Organic Baby Bio Liquid Houseplant Food 175ml Cover
Organic Baby Bio Liquid Houseplant Food Concentrated Nitrogen Feed 175ml

The Baby Bio Houseplant Food is designed to enhance the health and appearance of your indoor plants. With just 5-10 drops mixed into half a litre of water, you can easily nourish your houseplants, promoting lush green leaves and vibrant flowers. Its balanced formula ensures that your plants receive essential nutrients for bigger blooms and strong roots. This product is suitable for all houseplants, making it a convenient choice for any plant lover looking to brighten their home.

What We Like
Promotes healthier plants
Easy application
Balanced nutrient formula
Suitable for all houseplants
#TOP 2

Vitax Q4 All Purpose Plant Food, Fertiliser Enriched With Organic Nutrients

2.5 Kg
Vitax Q4 All Purpose Plant Food, Fertiliser Enriched With Organic Nutrients Cover
Vitax Q4 All Purpose Plant Food, Fertiliser Enriched With Organic Nutrients, More Flowers, Bigger Yields, Slow Release - 2.5 Kg

Features
PROFESSIONAL QUALITY: Originally Developed For Commercial Growers, Vitax Q4 Fertiliser Ensures Bigger, Brighter Blooms And Bumper Crops.
ALL-PURPOSE FERTILISER: Vitax Q4 Pelleted Fertiliser Is Ideal For Flowers, Vegetables, Fruit, Tomatoes, And Chrysanthemums, Making It A Favorite Among Experienced Gardeners.
VERSATILE APPLICATION: Perfect For Roses, Fruit, And Lawns, And Can Be Applied Before Planting To Boost Establishment Or As A Top Dressing During The Growing Season.
ESSENTIAL NUTRIENTS: Contains Vital Plant Foods And Trace Elements Essential For Abundant Growth And Healthy Plants
EASY TO HANDLE: Low Dust, Pelleted Format Makes Application Simple And Mess-Free. Simply Work Into The Soil And Water In.
#TOP 3

Will & Al's Bloom Organic Plant Fertiliser

The Natural Plant Food Company
I2-0NIB-TASF
1 Litre
Will & Al's Bloom Organic Plant Fertiliser Cover
Will & Al's - Bloom 1 Litre Organic All-Purpose Plant Fertiliser – Perfect for Indoor & Outdoor Plants, No Added Chemicals

Will & Al's Bloom Fertiliser is a nutrient-rich solution made from 100% natural ingredients, designed to enhance plant strength and promote stunning blooms. By using this fertiliser, you can ensure healthier plants throughout the growing season, whether in pots, baskets, or garden beds. Its balanced composition includes essential nutrients like nitrogen for lush growth, phosphorous for strong roots, and potassium for sturdy stems, giving your plants a comprehensive boost. Plus, it’s safe for pets and wildlife, creating a nurturing environment for all.

What We Like
Nutrient-rich natural formula
Promotes overall plant health
Safe for pets and wildlife
Balanced nutrient composition
Suitable for various plant types

Vitax Organic Liquid Seaweed for Plants

STV963B
1 litre
Vitax Organic Liquid Seaweed for Plants Cover
Vitax Organic Liquid Seaweed, Concentrated, Bigger Crops, Healthier Plants, Suitable For Plants, Flowers and Fruit & Vegetables- 1 Litres

Vitax Liquid Seaweed is a concentrated, all-natural nutrient solution designed to support healthy growth in your garden. It can be used as a liquid root drench or foliar spray, making it versatile for flowers, fruit, and vegetables. Regular application not only promotes larger, tastier crops but also enhances the resilience of your plants against environmental stress and pests. With easy application methods, it simplifies the process of maintaining the health of your garden plants.

What We Like
All-natural nutrients
Versatile application methods
Boosts crop quality
Enhances plant resilience
Easy to use

Phostrogen Ericaceous Plant Food for Acid-Loving Plants

86601241
Pink
Phostrogen Ericaceous Plant Food for Acid-Loving Plants Cover
Phostrogen Ericaceous Plant Food, 800g - Iron Rich Organic Ericaceous Plant Food - for Healthier Acid Loving Plants - Helps Prevent Leaf Yellowing - Plant Nutrition - Indoor and Garden Use

Phostrogen Ericaceous Plant Food is designed for healthier, more beautiful acid-loving plants. This organic formula is ideal for azaleas, camellias, and rhododendrons, making it perfect for your garden. It helps prevent leaf yellowing by being rich in iron, ensuring greener and healthier leaves. The easy application process allows you to simply apply it to the base of the plant and hoe before watering, making plant care straightforward and effective.

What We Like
Rich in iron for healthy leaves
Ideal for acid-loving plants
Easy application process
Approved for organic gardening

Bronte Heritage Organic Rose & Shrub Fertiliser

Bronte Heritage Collection
BSHF01SGL
Bronte Heritage Organic Rose & Shrub Fertiliser Cover
Bronte Heritage Organic Rose & Shrub Plant Food | Concentrated Seaweed Fertiliser | Pet Safe 1L Makes 300L | UK Made for Stronger Blooms

Bronte Rose & Shrub Food offers a super concentrated formula that creates up to 300 litres of nutrient-rich fertiliser, saving you both time and money. It is organic, chemical-free, and pet friendly, ensuring the safety of your loved ones while helping your plants thrive. Infused with seaweed, this product enhances plant health and boosts growth, giving you vibrant plants with strong roots. Specifically formulated for roses and shrubs, it provides targeted care that results in stunning blooms, making it an excellent choice for your garden.

What We Like
Highly concentrated and economical
Safe for pets and wildlife
Boosts plant growth with seaweed
Specialised for roses and shrubs
Made in the UK
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What is a good organic fertilizer for flowers?

Plant-based organic fertilizers include such products as compost, cottonseed meal, alfalfa meal, soybean meal, and seaweed. Although cottonseed meal and soybean meal each offer up to 7 percent nitrogen, most plant-based fertilizers offer lower nutrient levels.

Editor's Notes

During our organic flower fertiliser research, we found 143 organic flower fertiliser products and shortlisted 6 quality products. We collected and analyzed 189,985 customer reviews through our big data system to write the organic flower fertilisers list. We found that most customers choose organic flower fertilisers with an average price of £5.48.

The organic flower fertilisers are available for purchase. We have researched hundreds of brands and picked the top brands of organic flower fertilisers, including Baby Bio, Vitax Ltd, The Natural Plant Food Company, Phostrogen, Bronte Heritage Collection.

Written by
Toby Butcher Avatar

Toby Butcher is a Horticulturist, and he earned his title as a Master Gardener in 2016. Toby has acquired a 25-year experience as a home gardener planting, designing, grooming vegetables and flowers. He is the leader of a plant group in Durham. Toby owns a blog where he publishes articles on growing and growing your flowers at home, in a vase, or in a garden.