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Hardy eucalyptus seeds for UK gardens

Updated: 21 October 2026

You want a gum that stays outside, including away from the mildest coasts, and this amazon.co.uk list has put an H3 blue gum and a tropical rainbow gum beside an H5 small-leaved gum. In this set, only named Eucalyptus parvula is an RHS H5 candidate for a colder British garden. Blue gum, river red gum and rainbow gum are not that plant. Prices and the full twelve listings are on the [eucalyptus seeds comparison](/hub/herb-seeds/eucalyptus-seeds). Peter F. matched listings captured on 19 October 2026 to RHS hardiness pages. We did not overwinter a trial row. A purchase through our links can earn a commission at no extra cost to you.

You want a gum that stays outside, including away from the mildest coasts, and this amazon.co.uk list has put an H3 blue gum and a tropical rainbow gum beside an H5 small-leaved gum.

Our top picks

SAFLAX SAFLAX Tasmanian bluegum seeds

Best overall

SAFLAX SAFLAX Tasmanian bluegum seeds
5.3/10about £4.55
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SaatPilot SaatPilot Eucalyptus parvula

Rank 2

SaatPilot SaatPilot Eucalyptus parvula
6.8/10about £4.99
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Seeds & Plants Shop by Ipsa Ipsa Eucalyptus deglupta

Alternative

Seeds & Plants Shop by Ipsa Ipsa Eucalyptus deglupta
2.8/10about £4.42
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On this page
  1. 1.What hardy means on an RHS page
  2. 2.The packets that do not qualify for a cold garden
  3. 3.The 65 centimetre height field
  4. 4.Frost hollows and the first winter

What hardy means on an RHS page

H5 is about -15 to -10°C. H3 is about -5 to 1°C, a mild and coastal rating. A seedling in a pot is not a mature shrub that has already passed a winter in the ground. H5 does not mean a November seedling will take the first hard frost in a hollow. Eucalyptus parvula, small-leaved gum, is H5 on the RHS page. It is also filed as E. parvifolia. The page wants full sun and shelter, and it puts an uncut plant above 12 metres. SaatPilot, 50 seeds at £4.99, is the listing that prints that name, with outdoor, full sun, spring, and a height field of 800 cm. You are buying the name. Cider gum, Eucalyptus gunnii, is not in this set. The RHS class is H5.

The packets that do not qualify for a cold garden

Both SAFLAX Tasmanian bluegum packets are Eucalyptus globulus bicostata. The RHS page for E. globulus is H3, a fast tree to 30 metres or more. A Forestry Commission key calls blue gum very frost tender. The £4.55 packet is 100 seeds. The £5.25 packet adds coconut fibre. Neither price changes the class. They are a conditional buy on a mild coast, or in a container you can protect, and a no for an inland frost hollow. River red gum is the same conditional no. SAFLAX Eucalyptus camaldulensis is 200 seeds at £4.55, and the RHS rates it H3, wanting sun, shelter and well-drained soil. Rainbow gum is a no for an outdoor UK winter. Ipsa names Eucalyptus deglupta, 20 seeds at £4.42, and prints an outdoor window from April to August. That window is not a winter. Unnamed green packets have no class, so they get no outdoor yes.
SAFLAX SAFLAX Tasmanian bluegum seeds

Testsieger

SAFLAX SAFLAX Tasmanian bluegum seeds
5.3/10about £4.55
View offer

The 65 centimetre height field

The 65 cm field appears on the blue gums, the river red gum, Silver Plate and the Ipsa packet. A gum the RHS describes at 12 to 30 metres does not finish at knee height because a form says 65 cm. SaatPilot's 800 cm is the outlier, and you should still read 'above 12 metres' before you plant near a house. Forest Research notes that cider gum has no resting bud, so a warm spell then a hard frost catches growth that never shut down. Cider gum is not this packet.

Frost hollows and the first winter

Give E. parvula shelter, full sun, and a spot that is not the bottom of a slope. Keep it off walls and drains. Young plants are the vulnerable ones, which is why hardy seed wants a mid-February start and a move outside by mid-summer. Eucalyptus is not on the GOV.UK list of invasive plants of special concern, so garden planting is lawful. Lawful is not sensible next to a foundation. Cold garden: SaatPilot E. parvula, with shelter and a coppice plan. Mild coast: blue gum or river red gum only if you accept H3. Outdoor winter: not rainbow gum, and not an unnamed green pack.

Common questions

Which of these packets can stay outside in most of the UK?
SaatPilot Eucalyptus parvula, 50 seeds at £4.99, is the H5 name in this set. The RHS rates small-leaved gum for colder gardens than blue gum, above 12 metres if uncut, in sun and shelter. The listing has no review score here. A seedling still needs a settled first season. H5 is not a blanket for a pot left on a frosty balcony.
Is Tasmanian bluegum hardy?
It is H3, not H5. SAFLAX Eucalyptus globulus bicostata is the packet, at £4.55 or £5.25 with substrate. The RHS describes E. globulus as a mild and coastal tree that can exceed 30 metres. A forestry key has called blue gum very frost tender. Use it where winters stay mild, or in a pot you can protect, not as a substitute for E. parvula.
Will rainbow eucalyptus colour and survive in England?
Do not expect it to survive an outdoor British winter. E. deglupta is tropical, and a specialist nursery brings it indoors before frost. Ipsa's April-to-August outdoor line is a listing window. We are not promising the painted bark you see in photographs. The unnamed 80-seed rainbow pack tells you even less.
Is river red gum a waterside tree I can put in a wet border?
No. Eucalyptus camaldulensis grows along Australian waterways, and the RHS still wants sun, shelter and well-drained soil for it in Britain. The class is H3. SAFLAX sells 200 seeds at £4.55. A wet, cold border is the wrong translation of 'river'.
Why do listings say 65 centimetres?
The same height field is copied across unrelated packets. It is not the mature size. The RHS puts E. parvula above 12 metres and E. globulus at 30 metres or more. SaatPilot's 800 cm is the only tree-scale Amazon figure here, and it is still short of the RHS maximum. Plan for a tree, or for regular cutting.
Is cider gum hardier, and can I buy it here?
Cider gum, E. gunnii, is the species UK forestry notes treat as one of the more realistic eucalypts for Britain, and it is not a named packet in this set. Buy seed that prints the name. Do not assume a green eucalyptus bag is cider gum. E. parvula is the hardy species this comparison can actually point at.
Does H5 mean a seedling will take a November frost?
No. The RHS H5 band is about -15 to -10°C as a class for the plant, not a test certificate for a seedling in a module. Young plants and frost hollows are the failures nurseries warn about. Establish hardy stock in the ground by mid-summer, in shelter, and do not read the class as permission to plant into the first cold week of winter.

Related pages

Eucalyptus seeds buying guide

Best eucalyptus seeds

Eucalyptus seeds for pots

Eucalyptus seeds

How to grow eucalyptus from seed UK: chill, then sow

Sources

Public UK sources named below. amazon.co.uk prices, stars and review counts on these twelve listings were read on 19 October 2026. Page updated 21 October 2026.

  1. RHS eucalyptus growing guide (retrieved 19 October 2026)
  2. RHS Eucalyptus gunnii (retrieved 19 October 2026)
  3. RHS Eucalyptus globulus (retrieved 19 October 2026)
  4. RHS Eucalyptus parvula (retrieved 19 October 2026)
  5. RHS Eucalyptus camaldulensis (retrieved 19 October 2026)
  6. Forest Research cider gum (retrieved 19 October 2026)
  7. GOV.UK invasive non-native plants (retrieved 19 October 2026)
  8. ASPCA eucalyptus (retrieved 19 October 2026)