The best bonsai seeds, compared.
Top pick: 50 albizia silk tree seeds Best value: No best-value row – The £5.99 packets are cheaper and, on this evidence, not a usable cheaper job. Named Acer palmatum packets at about £2 to £4 were not scored as rows. Updated October 2026.
A bonsai seed packet is ordinary tree or shrub seed, not a finished bonsai. Quality starts with a botanical name you can match to a sowing method, then with viable seed, then with pots only if you do not already own them. The Royal Horticultural Society treats bonsai as moderate to difficult and year-round. Bonsai and both put the first styling around three years after sowing. That is a published expectation, not a result from this page. A purple, blue, or rainbow leaf in a title is not a species this comparison tested. UK buyers on amazon.co.uk are choosing a named species, a mixed starter kit, or a colour-claim title that reviews sometimes say is not the tree in the photo. How to choose is set out in the [bonsai seeds buying guide](/hub/seeds-and-plants/bonsai-seeds/sub/bonsai-seeds-buying-guide).
A bonsai seed packet is ordinary tree or shrub seed, not a finished bonsai.
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Personal buying guide
Question 1 of 2
What do you need in the box?
This packet is 50 seeds at £5.99, titled rainbow bonsai albizia and also called mimosa silk tree, with the manufacturer field Green Vendor and the plant-type field silk tree. The use field says outdoor, the colour field says rainbow, and the expected height field says 50 centimetres, with summer bloom mentioned on the listing. The star line is 5.0 from two reviews, and the file contains that score with no review text, so nobody has written whether the seed germinated. A rainbow leaf is a title, not a colour this comparison measured. It stays in the set because it is tree seed sold as bonsai, and the silk-tree name is a real plant rather than a misspelled maple. Two reviews and no comments are not a best-in-set result.
Pros
Cons
Best for: Someone who specifically wants albizia seed and will ignore the rainbow wording.
Less suitable: Anyone reading 5.0 as proof of germination, or anyone who wanted maple.
Specifications
Common questions
What plant does this packet name?
The title says Albizia and mimosa silk tree, and the plant-type field says silk tree. The colour field says rainbow.
Can it be grown indoors, according to the listing?
The page asks that question and does not answer it. The use field says outdoor. Sunlight is not filled in.
Why is the star line hard to use?
The listing shows 5.0 from 2 reviews. The raw file has that score and no review text, so there is no written comment on germination.
The Gift Republic kit, model GR200006, is the only listing in this set that includes the first sowing, not just a packet. At £12.40 you get four mixed seed packets, five coconut-husk pots, five coir compost discs and five wooden markers, and the origin field says United Kingdom. Across 2,610 amazon.co.uk reviews the score is 4.2, and those reviews split between gifts that produced seedlings and orders that never germinated. The packets are unnamed, so you cannot match a cold spell to a species from the page. One reviewer treated the box photograph as four or five years away, which is a comment rather than a measured trial. The expected height field says 12 centimetres, which is the listing figure rather than an adult tree. Reviews also call the leaflet thin, and five pots do not line up with four packets.
Pros
Cons
Best for: A gift when unnamed seed is acceptable and you do not already own pots.
Less suitable: Anyone who needs Acer palmatum, or a tree that already looks like the box photo.
Specifications
Common questions
Which bonsai species are in the Gift Republic kit?
The bullets say four packets of mixed bonsai seeds and do not name a species. UK reviews in the raw file say the packets are unidentified.
Does this kit include pots and compost?
Yes. The listing lists five coconut-husk starter pots, five coconut-husk compost discs, and five wooden markers, plus the four seed packets.
What height does the listing state?
The expected plant height field says 12 centimetres. That is the figure on the amazon.co.uk listing, not a measured adult tree.
This £5.99 packet lists 20 seeds under a purple blue ghost Japanese maple title, with the Latin name written Acer Palatum rather than Acer palmatum. The brand field says SwansGreen while the title says SVI, so the seller identity is not stable on the page. The use field says outdoor, sunlight is full sun and soil is loam, which at least points outside, where Japanese maple belongs. A special-feature line says potted, and one UK review says there is no pot to plant into. The star line is 4.0 from three reviews, and another review only says the seed was still growing, which is too small a file to read as a germination rate. A blue or purple leaf in the title is a claim to check, because named Japanese maple cultivars do not come true from seed.
Pros
Cons
Best for: Only a buyer who will treat the title as unverified and already owns pots.
Less suitable: Anyone who wants a packet that simply says Acer palmatum.
Specifications
Common questions
Does the listing say this maple packet is for indoors?
The use field says outdoor. A question on the page asks if it can grow indoors, and the raw file has no answer.
What soil and sun does the listing give?
Soil is loam and sunlight is full sun. Watering is moderate. No expected height is printed.
Is a pot included?
The special-feature field says potted. A UK review says there is no pot to plant into. The piece count is 20 seeds.
The 50-seed packet uses the same purple blue ghost title at £5.99, brand SVI, part number SVI1191, with a packet weight of 20 grams and a package size of 11 cm by 11 cm by 2 cm. A bullet calls cultivation very easy and the use field says indoor, which fights the months of warmth and cold that UK maple sellers describe for dry Acer palmatum. The amazon.co.uk score is 2.2 from eight reviews. One UK review says the seeds are tiny, do not look like acer, and that growth after three days looked like cress. Another says there are no blue maples and that palmatum is misspelled. That is a description from reviewers, not a laboratory identification, and it is the reason to skip this row if you wanted Japanese maple.
Pros
Cons
Best for: Nobody who is trying to grow Japanese maple from this set.
Less suitable: Beginners who will trust the words very easy and the leaf colour in the photo.
Specifications
Common questions
What do UK reviews say about these 50 seeds?
One UK review says the seeds are tiny, do not look like acer seeds, and that growth after three days looked like cress. Another says the spelling and the blue maple claim are wrong.
Does the listing say it is easy and indoor?
A bullet says indoor plants and very easy. The use field says indoor, sun says full sun, and soil says loam.
How is the packet described physically?
The bullet says a lot of 50 pieces, package weight 0.020 kg, and package size 11 cm by 11 cm by 2 cm. Item weight is 20 g.
Four amazon.co.uk listings were scored for this page. Weights sum to 100. No germination test was run. Figures are the amazon.co.uk price, star rating, and review count on the kept listings, plus what the listing and UK review text actually say. A 5.0 from two reviews with no written comments cannot outrank a 4.2 from 2,610.
Stars and sample
40%Star rating scaled against five, then cut hard when fewer than ten people have reviewed. A thin file stays low even when the average is high.
First sowing
25%Points for pots and compost in the box. Seed-only packets score low here even when the count is 50.
Name match
25%A single common name you can sow against scores higher than an unnamed mix. A misspelled Latin name, a brand field that clashes with the title, or UK reviews that say the seed does not look like the tree, score low.
Price against that job
10%£12.40 for a complete kit is judged against a usable first weekend. £5.99 is not treated as value when the species is the thing in dispute.
The checks run in this order: a name you can sow, a method for that species, what is in the box, indoor or outdoor fit, then price. The table is the four listings. No germination test was run. A leaf colour in a title stays a claim.
A bonsai seed packet is ordinary tree or shrub seed. UK buyers on amazon.co.uk are choosing a named species, a mixed starter kit, or a colour-claim title that reviews sometimes say is not the tree in the photo. The Royal Horticultural Society treats bonsai as moderate to difficult and year-round. Bonsai Empire puts the first styling around three years after sowing, and BBC Gardeners' World gives the same sort of wait. That is a published expectation, not a germination result from this desk.
Bonsai Empire and BBC Gardeners' World both put the first styling around three years after sowing. A 12 cm height field is the listing figure, not an adult tree.
Dry Japanese maple usually needs warmth and then cold. A very easy indoor line on a maple title fights the specialist guides. Cultivars do not come true from seed.
Purple, blue, and rainbow are title claims. UK reviews on the 50-seed maple file say the seed does not look like acer. That is a reviewer description, not a lab identification.
A single common name, or a Latin name you can match to a method, comes first. An unnamed mix hides the chill the seed needs. A fantasy colour is not a species. Dry Japanese maple usually needs warmth and then a moist chill. The RHS describes that chill as below 5°C for about four to 20 weeks, sometimes after warmth. A bullet that says very easy and indoor, on a maple title, fights that method. Japanese maple cultivars do not come true from seed.
A kit that includes coir pots solves the first weekend. The Gift Republic box has four mixed packets, five coconut-husk pots, five compost discs and five markers, origin printed as the United Kingdom, at £12.40. Five pots do not line up with four packets. A 50-seed count does not prove the seed is maple, and the seed-only packets do not list compost. Read the indoor or outdoor field, then check it against the plant. RHS outdoor starters include Japanese maple, pines, larch, and yew.
Three typical situations, each with a recommendation from this comparison.
You want a complete box, and unnamed seed is acceptable. The Gift Republic kit is the only row with coir pots, compost discs and markers, at £12.40, with 4.2 from 2,610 reviews. Those reviews split between seedlings and orders that never germinated.
You want albizia, also called mimosa silk tree, and you will ignore the rainbow wording. The 50-seed packet names silk tree and says outdoor, at £5.99. The star line is 5.0 from two reviews with no written comments, so it is not a germination result.
You already own pots and you will treat a colour title as unverified. The 20-seed maple listing is £5.99, outdoor, with the Latin name spelled Acer Palatum and 4.0 from three reviews. One UK review says there is no pot. It is not a named Acer palmatum packet.
The top pick is the Gift Republic bonsai seed kit at £12.40, with 4.2 from 2,610 reviews, five coir pots and five compost discs. The four packets are mixed and unnamed, and reviews include both sprouts and total failure. There is no best-value badge. The £5.99 packets are cheaper and, on this evidence, not a usable cheaper job. The silk-tree packet names a real plant and has 5.0 from two reviews with no text. The two maple titles spell Acer Palatum, and UK reviews on the 50-seed file say the seed does not look like acer.
No best-value row
The £5.99 packets are cheaper and, on this evidence, not a usable cheaper job. Named Acer palmatum packets at about £2 to £4 were not scored as rows.
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.
Sources taken from the research digest. Listings were checked in October 2026.
This article contains affiliate links. If you buy through these links we may earn a small commission, at no extra cost to you. Prices, stars and review counts come from stored amazon.co.uk listings. We did not run a germination test.
