Best Liquid Fertilizer For Roses: 10 Options Compared

#1 · Best Overall

1. Farmer's Secret Rose Booster

• Form: Liquid
• Weight: 11.2 oz

Best for: Weekly feeding for rose varieties.

Why it ranks #1: Made for all rose varieties and life stages, with clear directions to dilute two teaspoons per gallon and apply weekly during the growing season.

A two-teaspoon dose diluted in one gallon of water gives rose growers a defined weekly feeding routine during the growing season. Farmer’s Secret says its concentrated liquid is formulated for all rose varieties throughout their life cycle, making it a single feeding option across a mixed rose planting.

The stated dilution—two teaspoons per gallon—provides a repeatable mixing measure, while weekly application during the growing season gives gardeners a clear schedule. The formula is specified for all rose varieties and stages of growth, so one bottle can serve different roses in the same garden. It can be applied to foliage or soil, offering two ways to work feeding into routine care. Its extra-concentrated formula makes many gallons of feed from one bottle.

Skip it if you want a ready-to-use liquid; TPS Nutrients Rose Bush Fertilizer is listed as ready to use.

Choose this for a mixed rose garden when a measured weekly feeding routine and foliage-or-soil application suit your care schedule. The concentrate requires dilution, and its listed timing is weekly during the growing season.

Listed on Amazon as: Farmer's Secret Rose Booster Fertilizer (32oz) – Super Concentrated – Formulated for All Types of Roses Throughout the Life Cycle – Encourages Healthy Growth and Vibrant Blooms

#2 · Best NPK Detail

2. Neptune's Harvest Rose Fertilizer

• Form: Liquid
• Weight: 2.3 lb

Best for: Organic feeding for flowering plants.

Why it ranks #2: Rose-and-flower-specific organic liquid lists a 2-6-4 NPK ratio plus 1% calcium, useful for buyers who want a stated nutrient analysis.

A stated 2-6-4 NPK formula gives Neptune’s Harvest Rose & Flowering Fertilizer a defined nutrient profile for roses and flowering plants. This organic liquid is also described as promoting root development, bud density, and flower production, making it relevant to gardeners tending blooms beyond roses alone.

The 2-6-4 formula, with listed nitrogen, phosphate, and potash percentages, gives buyers specific nutrient information for comparing feeding options. The product description connects the formula to root development, greater bud density, and vibrant flower production. Its stated use for roses and other flowering plants can simplify feeding where those plants share a routine. The 36-ounce bottle is a liquid concentrate; the supplied information does not specify a dilution rate or application schedule.

Skip it if you need a stated mixing ratio and schedule; Farmer’s Secret Rose Booster specifies both.

Consider this for a garden with roses and other flowering plants when the listed 2-6-4 profile is useful. The supplied details do not provide a mixing ratio or schedule, so those specifics are not established here.

Listed on Amazon as: Neptune's Harvest Rose & Flowering Fertilizer (2-6-4) – 36oz Bottle – Organic Liquid Food for Vibrant Blooms & Growth – Promotes Healthy Foliage – Ideal Fertilizer for Indoor & Outdoor Use

#3 · Best Soil Schedule

3. Heirloom Founder's Fish Fertilizer

• Form: Liquid
• Weight: 4 oz

Best for: Fish emulsion for rose beds.

Why it ranks #3: Rose-focused fish emulsion provides explicit directions: four ounces per gallon, every four to six weeks for in-ground plants.

A soil-application rate of four ounces per gallon gives Heirloom Founder’s Fish Fertilizer a concrete mixing guide for rose beds. Its organic fish emulsion is described as feeding mycorrhizae and supporting soil bacteria, making it a fit for growers who want a soil-focused feeding approach.

The directions say to mix four ounces per gallon of water, with one gallon of solution enough for two to three roses. That guidance helps estimate a batch for a small group of plants. For in-ground roses, the stated interval is every four to six weeks; container plants are listed at every three to four weeks. The fish-derived fertilizer is described as supporting mycorrhizae, soil bacteria, plant growth, and nutrient reception, linking application to soil activity.

Skip it if you prefer weekly feeding; Farmer’s Secret Rose Booster lists a weekly growing-season schedule.

This suits rose growers who want a fish-based liquid and can follow separate timing for in-ground or container plants. The listed soil mix is four ounces per gallon, so account for that rate when preparing solution.

Listed on Amazon as: Heirloom Founder's Fish Fertilizer, Liquid Plant Food, 32 Fl Oz

#4 · Large Bottle

4. TPS Nutrients Rose Fertilizer

• Form: Liquid
• Weight: 2 lb

Best for: Fast-absorbing outdoor rose feed.

Why it ranks #4: Specifically formulated for outdoor roses, this 32-ounce liquid supports blooms and roots, although the supplied data gives no dilution schedule.

Fast-absorbing liquid delivery is the central practical feature of this TPS Nutrients formula for outdoor roses. It is described as supporting fuller, brighter blooms, consistent flowering, strong roots, and plant development, while its stated scope covers all types of roses in outdoor settings.

The formula is specifically stated for outdoor roses of all types, making its intended setting clear for gardeners choosing feed for beds or outdoor containers. Its fast-absorbing liquid format is presented as a way to deliver nutrients efficiently. The listed benefits include fuller, brighter flowers and consistent blooming, as well as stronger roots and overall plant development. The supplied information does not include a dilution ratio or application frequency, so dosing details are not established here.

Skip it if you need explicit dilution directions; Farmer’s Secret Rose Booster lists a two-teaspoon-per-gallon rate.

Choose this for outdoor rose growers seeking a liquid feed associated with blooms, roots, and plant development. Its setting is outdoor roses, and the supplied details do not specify a mixing ratio or feeding frequency.

Listed on Amazon as: Rose Fertilizer, Liquid Plant Food for More Blooms & Vibrant Color, 32 oz

#5

5. TPS Nutrients Rose Bush Fertilizer

• Form: Liquid
• Weight: 0.28 kg

Best for: Ready-to-use rose feeding.

Why it ranks #5: A dedicated rose-bush liquid with ready-to-use directions for leaves and soil, but its eight-ounce size is smaller than the 32-ounce TPS option.

Ready-to-use directions set this TPS Nutrients liquid apart: apply it to rose leaves and soil without first mixing a dilution. The 8-ounce rose bush fertilizer is described as fast-absorbing and intended to support blooms, roots, and overall plant structure, giving growers a direct application option.

Applying the liquid to both leaves and soil gives the directions two routes for feeding rose bushes. Its ready-to-use format removes a dilution step, which can simplify a quick application, while the fast-absorbing formula is presented for efficient nutrient delivery. The stated goals include fuller, brighter flowers, consistent blooming, strong root development, and overall plant structure. At 8 ounces, this is a smaller listed size than the brand’s 32-ounce rose fertilizer.

Skip it if you need a 32-ounce bottle; TPS Nutrients Rose Fertilizer is listed in that size.

This suits rose growers who want direct application to leaves and soil without a mixing step. Consider the listed 8-ounce size when choosing for the number of bushes or the amount of liquid your routine requires.

Listed on Amazon as: Rose Bush Fertilizer – Liquid Plant Food for More Blooms, 8 oz

#6 · Three-in-One Care

6. BioAdvanced Rose and Flower Care

• Form: Liquid
• Weight: 2 lb

Best for: Combined flower feeding and protection.

Why it ranks #6: For roses and other listed flowers, it combines fertilizer with insect and disease control and claims systemic, rainproof protection lasting up to six weeks.

Three functions in one concentrate—fertilizer, insect control, and disease control—make BioAdvanced All-In-One Rose and Flower Care distinct from a bloom-only feed. Its systemic formula is described as rainproof for up to six weeks, combining plant nutrition with listed pest and disease protection in one application approach.

The product combines fertilizer with insect and disease control, so buyers seeking those functions can use one listed concentrate rather than separate products for each role. The directions say to mix and pour, with no spraying, which changes the application workflow. Its systemic protection is described as rainproof and lasting up to six weeks. Listed plants include roses, iris, hibiscus, azaleas, camellias, and rhododendrons; named concerns include several pests and diseases.

Skip it if you want fertilizer without bundled insect and disease control; Neptune’s Harvest Rose & Flowering Fertilizer is a bloom-focused liquid.

Consider this for roses and listed flowering plants when combined feeding and systemic pest and disease control suit your care plan. It is not a fertilizer-only choice, and the supplied directions call for mixing and pouring.

Listed on Amazon as: BioAdvanced All-In-One Rose and Flower Care Concentrate – 32 oz Bottle

#7

7. Great Big Roses Booster

• Form: Liquid

Best for: Soil biology and existing fertilizer.

Why it ranks #7: Designed for rose and flower gardens, but its low NPK role is to help soil life make existing nutrients available rather than serve as standalone fertilizer.

Dormant living ecology from premium compost is described as activating on contact with moist soil, where it works to make existing nutrients available to roses. Great Big Roses is therefore a soil-focused booster for gardeners who want to support the usefulness of nutrients already present in their beds.

The product description says its living ecology wakes when it reaches moist soil, then helps make nutrients in rose beds available to plants. That role differs from supplying a substantial NPK feed: the listing says its NPK stays low and frames the product as a partner to existing rose fertilizer. This makes the most sense in a bed with nutrients or fertilizer already present. The supplied information does not give a specific rose application rate or schedule.

Skip it if you need a standalone nutrient feed; Neptune’s Harvest Rose & Flowering Fertilizer lists a 2-6-4 NPK formula.

Choose this when you want a soil-life booster to complement nutrients already in rose beds. It is not presented as a standalone high-NPK feed, and the supplied details do not specify a rose dose or schedule.

Listed on Amazon as: Great Big Roses Fertilizer Booster for Rose & Flower Gardens, 32 Ounce

#8

8. GrowThrive Rose Liquid Fertilizer

• Form: Liquid

Best for: Soil-focused organic rose care.

Why it ranks #8: The rose-targeted formula includes natural microbes and a 1:400 dilution direction, though its description also emphasizes hydrangeas and blooming shrubs.

A 1:400 dilution gives GrowThrive Rose Liquid Fertilizer a clear mixing ratio for soil or foliage application. Its description pairs organic components and active enzymes with soil-structure and nutrient-availability support, making this a fit for rose growers interested in both plant feeding and conditions around the roots.

The 1:400 water dilution gives gardeners a specific ratio to follow, and the stated soil-or-foliage directions offer flexibility in how the liquid is applied. GrowThrive describes active enzymes and organic components as aiding decomposition of organic matter, enhancing soil structure, and increasing nutrient availability. Natural amino acids are also listed as part of the plant nourishment. The product is tailored to roses but also named for hydrangeas and other blooming shrubs, supporting shared use among those plantings.

Skip it if you want a larger listed bottle; Farmer’s Secret Rose Booster comes in a 32-ounce size.

This fits rose growers who want a stated dilution ratio and soil-or-foliage application, especially when feeding blooming shrubs too. Its 10-ounce listed size is a practical consideration for gardens needing more liquid.

Listed on Amazon as: Rose Liquid Fertilizer – Organic Slow Release Liquid Plant Food, 10 oz

#9

9. BIOPLENAFEED Rose Plant Food

• Form: Liquid
• Weight: 8 oz

Best for: Multi-plant concentrated feeding.

Why it ranks #9: The concentrated solution is described for roses and many indoor and outdoor plants, but its broad all-purpose positioning is less tailored than rose-specific feeds.

Use across roses, indoor plants, and outdoor plants gives BIOPLENAFEED’s concentrated liquid a broader role than a rose-only fertilizer. Its listed ingredients include primary nutrients and several micronutrients, while the product description connects the formula with blooms, roots, and foliage for gardeners feeding varied plantings.

The stated use spans roses, houseplants such as orchids and tropicals, and vegetable gardens, which can consolidate feeding across different parts of a home garden. The listed ingredients include nitrogen, available phosphate, soluble potash, calcium, magnesium, and several trace elements. That ingredient range gives buyers more detail about the formula than a simple NPK-only description. The supplied facts identify it as concentrated but do not provide a dilution ratio or application schedule.

Skip it if you need a stated dose and schedule; Farmer’s Secret Rose Booster lists a weekly rate and dilution.

This suits growers who want one concentrated liquid for roses alongside houseplants or vegetables. The supplied details do not establish a mixing rate or timing, so buyers needing explicit application directions should account for that gap.

Listed on Amazon as: All-Purpose Rose Plant Food Fertilizer | Concentrated Nutrient Solution for Indoor & Outdoor Plants | Promotes Vibrant Blooms, Strong Roots & Lush Foliage | Made in The USA

#10

10. Farmer's Secret Desert Rose Food

• Form: Liquid
• Weight: 8 oz

Best for: Concentrated feed for desert roses.

Why it ranks #10: Its 3:11:8 formula and directions target desert rose, Adenium obesum, rather than typical garden rose bushes, making it the weakest use-case match.

Separate dilution amounts for younger and mature plants make this Farmer’s Secret liquid distinctive for Adenium obesum care. The 3:11:8 formula is specified for desert roses, with stated aims of promoting flowering, all-around growth, and a thicker trunk rather than serving as a general rose-bush feed.

The directions distinguish plants under a foot tall from those over a foot: younger plants use half a teaspoon in at least two cups of water, while mature plants use one teaspoon in the weekly watering routine. This age-and-size distinction helps growers measure a dose around plant stage. The product is formulated for desert roses, and its 3:11:8 ratio is stated alongside flowering, growth, and trunk-development aims. The supplied facts also describe application every other watering cycle.

Skip it if you grow ordinary rose bushes; TPS Nutrients Rose Fertilizer is formulated for outdoor roses.

This is the relevant choice for Adenium obesum growers seeking a concentrated feed with age-specific dilution guidance. Its directions are for desert roses, so it is not the matching option for standard garden rose bushes.

Listed on Amazon as: Farmer's Secret Desert Rose Liquid Plant Food Fertilizer (8oz) – Super Concentrated – Promote Flowering and Trunk Growth – 3:11:8 Ratio