The best Buddleias, compared.
Top pick: Tricolour buddleia, one 2 L pot – Widest review file in the set, and the stored comments match a single 2 litre plant more clearly than the dearer three-pot title. Best value: Buddleia trio, three 9 cm pots – Three 9 cm plants at about £17.99 with their own 121 reviews, more buyer comments per pound than the unreviewed white pack. Updated October 2026.
Buddleia is the shop name, usually the deciduous butterfly bush davidii. Pots are 9 cm liners or 2 litre pots. A height field is often the pot, or the plant in the box, not the RHS band of about 2.5–4 metres if the shrub is left unpruned. B. davidii seeds onto disturbed ground, so deadhead it. How davidii forms differ from is in [davidii or ](/hub/ornamental-plants/buddleia/sub/buddleia-davidii-or-flower-power). The RHS rates B. davidii H6, hardy throughout the UK, in pruning group 6. It flowers on this year's wood, so the hard prune in the growing guide is late March to mid-April. The RHS lists it as × weyeriana ', pink and orange, about 2.5–4 metres tall with a spread of 1.5–2.5 metres. Carbeth's height field says 2 metres and the bullets say compact. Do not read the compact line as the RHS size. A different buddleja, such as B. alternifolia, is not pruned on that calendar. Buzz and, the RHS dwarf series, are not.
Buddleia is the shop name, usually the deciduous butterfly bush davidii. Pots are 9 cm liners or 2 litre pots.
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Personal buying guide
Question 1 of 2
Where will it live?
Carbeth sells one Buddleia davidii Tricolour in a 2 L nursery pot for £19.99, with pink, white and purple on the colour line and a deciduous bullet for sun and well-drained soil. The height attribute reads 60 cm, which is not the RHS mature band of 2.5–4 m for B. davidii, and stored reviews often describe a single 2 L plant that arrived smaller than a 40–60 cm hope. The star line is 4.0 from 425 reviews, the deepest pool in this comparison, though that same text block also sits on the three-pot tricolour listing at £46.99. Comments in the file mention packaging, healthy growth, and colours that did not all show on one shrub. In this set it carries the top pick badge because the reviews you can read most clearly match this one-pot title, not because tricolour guarantees three hues on every cane.
Pros
Cons
Best for: You want one 2 L butterfly bush with the widest review file in this set and you accept a full-size davidii-type shrub after hard pruning.
Less suitable: You need a guaranteed white flower, a plant that stays under 1.2 m without constant cutting, or proof that 425 reviews belong only to this SKU.
Specifications
Common questions
How many plants and what pot size does this listing state?
The title and a bullet say one Buddleia davidii Tricolour in a 2 L nursery pot. Unit count, number of pieces and number of items are all 1. The colour field is pink, white and purple.
What height and habit does the listing print?
The height attribute is 60 cm. A bullet calls it a deciduous shrub for sun and well-drained soil, flowering from summer into early autumn. The bloom attribute says spring to summer. One stored review mentions an advertised 40–60 cm.
Do the 425 reviews belong only to this pot?
The listing line is 4.0 from 425. The first 50 stored texts are the same texts as the three 2 L pot ASIN, and they include a £18.99 complaint and a review of one 2 L plant. The file does not show 425 separate texts.
The title asks for three Buddleia davidii Tricolour plants in 2 L pots at £46.99, yet one bullet describes three plants grown in a single pot and calls the shrub evergreen with a 2 metre habit while the height attribute still says 60 cm. The sun line is partial shade in the table and full sun to half shade in a bullet, and bloom timing shifts between spring to summer and August to October. The listing repeats 4.0 from 425 and the same fifty stored texts as the £19.99 one-pot tricolour, including comments about one 2 L plant and an old £18.99 price. You are paying more than double for quantity and conflicting copy, not for a separate review history. Skip it unless you have checked the parcel count on arrival and you accept label noise that does not match RHS deciduous davidii.
Pros
Cons
Best for: You deliberately want several tricolour pots in one order and you will verify three separate rootballs when the box opens.
Less suitable: You assumed 425 reviews tested this three-pot pack, or you need listing copy that agrees on habit and height.
Specifications
Common questions
Is this three pots or one pot?
The title says three Buddleia davidii Tricolour in 2 L pots, and unit count, pieces and items are 3. One bullet says three plants grown in a single pot. Both lines are on the listing.
Why do the height and habit lines disagree?
The height attribute is 60 cm. A bullet says the plant grows to 2 metres, flowers from August to October, and is an evergreen shrub to prune in March. The sun attribute is partial shade, while that bullet says full sun to half shade.
Are the 425 reviews for this three-pot pack?
The listing prints 4.0 from 425, and the stored texts match the single 2 L tricolour ASIN, including a review of one 2 L pot and a £18.99 complaint. This shelf price is £46.99. The file does not show a separate count for the three-pot title.
Carbeth's buddleia trio is three separate plants in 9 cm pots for £17.99, roughly £6 each, with dark blue, red and white on the colour field and no cultivar name in the title. A bullet warns the mix may differ from the photograph depending on the season, and stored reviews on this ASIN repeat one colour only, especially purple or blue, plus dead, yellow or stick-like arrivals in part of the trio. The star line is 3.8 from 121 reviews, the only 9 cm pack here with its own text pool, which is why it wears the best value badge: more buyer comments per pound than the unreviewed white pack, not a quality medal. Partial shade is stated and poor soil is mentioned, but there is no mature height line. It suits a patient gardener who wants cheap liners and will deadhead; it is a weak buy if you need three named colours on dispatch day.
Pros
Cons
Best for: You want the cheapest reviewed multi-plant pack and you can grow on small pots before you judge flower colour.
Less suitable: You ordered three distinct colours for this summer, or you want a named AGM cultivar in a 2 L pot.
Specifications
Common questions
Will the three plants match the colours in the photograph?
The colour field says dark blue, red and white. A bullet says the mix depends on the time of year and may differ from the picture. Stored reviews often report one colour, especially purple or blue, and some pots had no colour label.
How big are the plants in this pack?
The title says three separate plants in 9 cm pots. There is no height attribute. Reviews describe small liners, and several say one or two of the three arrived dead, yellow or as bare sticks.
What sun and soil does the listing give?
The sun attribute is partial shade. Indoor or outdoor is outdoor. A bullet says the plants cope with neglect and poor soil. Moisture, bloom period and habit are not stated.
Flower Power is listed as two 2 L pots at £24.99 while unit count stays 1.0 and number of items reads 2, so the quantity line needs a check when the parcel lands. Bullets call it a compact, deciduous shrub for borders or a sunny container, with purple, orange and pink spikes from summer into autumn, yet the height attribute is 2 metres and RHS Buddleja × weyeriana 'Bicolor', the synonym for Flower Power, is banded at 2.5–4 m tall. The star line is 3.7 from 10 with only five stored texts, identical to the three-pot Flower Power page, and they read like single-plant stories: one healthy gift, one dry on arrival, poor packing, a snapped stem. That is too thin to treat compact as a measured fact. Choose it if you want the orange-pink globular look of × weyeriana and accept full-size hybrid pruning; skip it for a small patio unless you plan a very large final pot and annual hard cuts.
Pros
Cons
Best for: You want Buddleja × weyeriana Flower Power in 2 L pots and you will hard-prune each year for size.
Less suitable: You need a true dwarf patio buddleia, a verified two-plant count from the listing alone, or a deep review sample.
Specifications
Common questions
How many Flower Power plants are in this listing?
The title says two 2 L pots. Number of items is 2. Unit count is 1.0. The listing does not resolve that clash, and the image URL matches the three-pot Flower Power ASIN.
What size and colour does the listing claim?
The height attribute is 2 metres. A bullet calls the habit upright and compact, for borders or a sunny container, with purple, orange and pink spikes from summer into autumn. The bloom attribute is summer to autumn. Sun is full sun.
What do the stored reviews cover?
The listing line is 3.7 from 10, and the file holds five texts, the same five as the three-pot Flower Power ASIN. They mention one healthy gift plant, a parched plant, poor packing with no flowers, and a snapped stem.
This listing titles three Flower Power plants in 2 L pots at £34.99 with the same compact, deciduous, full-sun bullets as the two-pot pack and the same 2 metre height field. Unit count is again 1.0 while number of items is 3, and the best-sellers rank line matches the two-pot ASIN exactly. Reviews show 3.7 from 10 with the same five stored comments about one plant's condition, not a three-pack trial. You pay roughly £10 more per extra pot than the two-pack shelf price without gaining separate evidence. Functionally it is the same hybrid and the same label conflicts, scaled up. Take it only if you want multiple × weyeriana starts and will inspect three rootballs; otherwise the two-pot line or the davidii tricolour top pick is easier to read on the page.
Pros
Cons
Best for: You are planting several Flower Power shrubs and accept duplicate listing data across pack sizes.
Less suitable: You trusted the star line to mean three independently reviewed pots, or you wanted a compact patio plant under 1.2 m.
Specifications
Common questions
How many pots does this Flower Power listing claim?
The title says three 2 L pots. Number of items is 3. Unit count is 1.0. The best-sellers rank line is the same as the two-pot Flower Power ASIN.
What does the bullet say about size?
The height attribute is 2 metres. The bullet calls it a deciduous shrub with a compact form for smaller gardens and containers, in full sun and well-draining soil, pruned in early spring. Purple, orange and pink is the colour line.
Is the 3.7 from 10 a separate sample?
The five stored texts are the same as on the two-pot Flower Power ASIN. They describe one plant: healthy, parched, poorly packed, or snapped. The listing count is 10. The file does not show ten texts for this three-pot title.
The title names Buddleia davidii White Profusion, a cultivar you can look up on RHS pages, in three 9 cm pots for £14.45, the lowest shelf price in this set. The brand field reads Generic, the manufacturer line is RTR_MDH, and the height attribute is 9 cm, which matches the pot size rather than the RHS cultivar page of 2.5–4 metres. There is no amazon.co.uk star line and no review text in the saved listing, so you cannot cross-check arrival quality or flower colour against buyer reports. Sun, habit, bloom and soil are blank in the attributes. It is not the top pick and not the best value row, because those badges sit on reviewed listings. It only fits a buyer who deliberately wants a named white davidii cultivar at the lowest cash outlay and accepts zero review evidence and several years of growing on from 9 cm liners.
Pros
Cons
Best for: You want a named white davidii cultivar cheaply and you will judge health only when the parcel arrives.
Less suitable: You rely on amazon reviews, need listing care lines filled in, or expect a small white buddleia without hard pruning.
Specifications
Common questions
Which buddleia is named, and how many pots?
The title and bullet name Buddleia davidii White Profusion in 9 cm pots, quantity 3. Unit count is 1.0 and number of pieces is 3. The colour field is white. The brand field is Generic and the manufacturer is RTR_MDH.
Does 9 cm mean the mature shrub?
The height attribute is 9 cm, which is the same figure as the pot in the title. The listing has no separate mature-height line, no sun line, and no habit line. The RHS cultivar page says about 2.5–4 metres.
Are there reviews on the listing?
There is no customer-review line and no review text. Questions on the listing ask about butterflies, indoor growing and deer, and the attributes do not answer them.
Six amazon.co.uk buddleia listings were scored from the stored listing files, not from a garden trial. The published score takes the star average on a 70-point scale, so five stars would be 70, then adds a review-count part capped at 30. A 4.0 from 425 becomes 82. A listing with no star line scores 0. Shared review text is not read as a separate sample for each pack size. The weights below are those two parts and sum to 100. The top pick and the best value are the display badges.
Star line
70%The largest share is the amazon.co.uk star average, scaled so five stars would be 70 points before the review-count part. A 4.0 line scores higher than a 3.7 line. Stars are not a garden trial, and a shared pool is not one cultivar tested at every pack size.
Review count
30%Up to 30 points from the review count on that star line, using a log scale and a cap. A count of 425 adds more than a count of 10. Where two ASINs print the same stars, the same count and the same stored texts, that block is one pool.
Start with the name on the label, then the pot, then whose height figure you are reading, then colour against the photograph, then whether the star line belongs to that pack. The notes below follow that order. None of these six listings was grown on as a trial.
Buddleia on a UK listing is usually Buddleja, and most often the deciduous butterfly bush Buddleja davidii. The RHS rates B. davidii H6, hardy throughout the UK, in pruning group 6. It flowers on this year's wood, so the hard prune in the growing guide is late March to mid-April. Flower Power is a different plant. The RHS lists it as Buddleja × weyeriana 'Bicolor', pink and orange, about 2.5–4 metres tall with a spread of 1.5–2.5 metres.
White Profusion's height field is 9 cm, the same figure as the pot. The tricolour attribute is 60 cm. RHS B. davidii is about 2.5–4 metres if unpruned, or about 1.8–2.4 metres with a hard annual prune. Neither listing figure is a dwarf series.
The 9 cm trio says colours may differ from the picture, and stored reviews often report one colour. Tricolour is a seller phrase. One stored comment describes two colours in year two, which is not three hues on day one.
Both tricolour ASINs print 4.0 from 425 with the same texts. Both Flower Power ASINs print 3.7 from 10 with the same five texts. Those counts are not separate pack tests. The trio's 3.8 from 121 is its own pool. White Profusion has none.
The first line to read is the species or cultivar, not the photograph. B. davidii, including a seller tricolour and 'White Profusion', flowers on this year's wood. The RHS growing guide's hard prune is late March to mid-April. Flower Power is Buddleja × weyeriana 'Bicolor' on the RHS page, pink and orange, and it is pruned on that same new-wood calendar. B. alternifolia is not. 'White Profusion' is a white cultivar with a yellow eye, and the RHS cultivar page puts it in the 2.5–4 metre band.
A 2–3 litre pot is a normal nursery size in the RHS growing guide. A 9 cm pot is a liner. Flower Power's unit count is 1.0 while number of items is 2 or 3, so the title and the count line disagree. The three-pot tricolour title says three 2 litre pots and one bullet says three plants in a single pot. Height is the next trap. Unpruned B. davidii is about 2.5–4 metres tall and 4–8 metres wide. Hard pruning holds plants to about 1.8–2.4 metres. The single tricolour prints 60 cm.
Three typical situations, each with a recommendation from this comparison.
You have a sunny, drained spot and you will hard-prune in late March to mid-April. Carbeth's one 2 litre tricolour is the top pick at about £19.99, with a deciduous bullet and the widest review file in this set. The 60 cm height field is not the RHS mature band of about 2.5–4 metres.
You want a container, and a bullet says compact. Flower Power in two 2 litre pots is the listing that makes that claim, at about £24.99. The RHS page for Buddleja × weyeriana 'Bicolor' says 2.5–4 metres. Buzz and Nanho, the dwarf series, are not in this set. Plan a pot about 60 cm wide in time, not the sales pot alone.
You want flowers for nectar and you can grow on small pots. The 9 cm trio is the best value at about £17.99, with its own 3.8 from 121 reviews. Those reviews often report one colour, or a dead or tiny plant. Leaves of B. davidii are a poor caterpillar food, so still grow native larval hosts, and deadhead so it does not seed.
The top pick is Carbeth's one 2 litre Buddleia davidii Tricolour at about £19.99. It has the widest review file in the set, 4.0 from 425, and those texts read most clearly as one 2 litre plant, even though the same block also sits on the £46.99 three-pot listing. The 60 cm height field is not the RHS mature size. The best value is the 9 cm trio at about £17.99, about £6 a plant, with its own 3.8 from 121 reviews. Those reviews often report one colour, or a dead or tiny plant, so the badge is comments per pound, not a quality medal. White Profusion is cheaper at about £14.45 and has no star line. Flower Power's compact bullet does not replace the RHS 2.5–4 metre band for Buddleja × weyeriana 'Bicolor'.
Tricolour buddleia, one 2 L pot
Widest review file in the set, and the stored comments match a single 2 litre plant more clearly than the dearer three-pot title.
Buddleia trio, three 9 cm pots
Three 9 cm plants at about £17.99 with their own 121 reviews, more buyer comments per pound than the unreviewed white pack.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public sources from the research digest, last checked on 21 October 2026. Shelf prices and star lines are the amazon.co.uk figures in the display file. The price band is this set, not a market average. No listing was trialled in a garden.
Expert source (DIY & tools): Lee Burkhill (Garden Ninja) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the stored amazon.co.uk figures, not a live crawl. We did not grow these plants.
