Due to the coronavirus pandemic we have reluctantly had to cancel the next two meetings scheduled for 14 April and  12 May. We hope to resume the schedule of Autumn meetings commencing 8 September.

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Meeting Tuesday 11 February 2020

Despite high winds and an icy February chill, a full house attended the first meeting of the year. The speaker was Dr Ian Bedford an entomologist whose talk was ‘All you’ll ever need to know about slugs!’

What an  absolutely, interesting, fascinating and amusing talk, accompanied by a superb colour slide and video presentation, it was.

Surprisingly not all slugs devour your garden plants!

Slugs are hermaphrodites and evolved from snails around 500 million years ago. There are 5000 species worldwide and are essential for the ecosystem. 40 species are established in Britain. Slugs have brains and tentacles and can regenerate if cut. They thrive in damp conditions, producing slime which aids movement, offers a defence against predators and attracts mates. They will lay 2000 eggs in a lifetime. Mainly nocturnal, they feed on plants by rasping and ripping with their radula, a long tongue like proboscis.

Red and black slugs are good for gardens as they thrive under compost heaps.

Greyfield are surface slugs which can devour flowers and vegetables.

Yellow slugs eat mould, moss, lichen and are partial to pet food!

The most invasive slugs which can grow up to 6 inches long do most damage are the Spanish slugs. They are particularly attracted to yellow flowers especially fields of rape seed. They also eat other snails and dead mice. Fortunately they cannot cope with winter and die.

There are three ways to try and reduce the slug population in gardens.

Naturally. Frogs, toads, centipedes, snakes, toads and nematodes, hedgehogs all enjoy a good meal of slugs!

Physically Barriers of egg shells, copper, seaweed, salt, beer traps.

Chemically Do not use Metaldehyde as this will kill other wildlife especially hedgehogs. Ferric Phosphate is recommended as this is not harmful to other wildlife.

Drowning slugs should be done in a bucket of soapy water as this will restrict their escape. Bleach must be used afterwards to kill off any parasites which the slugs will have consumed. Again any slug remains must not be left on open ground as any household pets could be infected by the parasites.

For those interested, The RHS are recruiting slug spotters across Britain to take part in the largest garden study in 70 years. The RHS is calling on people to assist in a PHD study aimed at identifying species currently active in Britain, their abundance and what attracts them into gardens. The survey can found at

The next meeting will be on Tuesday 10 March at 8.00pm when our guest speaker will be David Coop of Elsoms Seeds who will talk about ‘How to choose the right compost’


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Catherine Horwood on Beth Chatto

Beth was the inspiration behind the ‘right plant,right place’ ethos that lies at the heart of modern gardening. Some years before her death in May 2018,aged 94,Beth authorised Catharine Horwood to write her biography. Beth Chatto: A life with plants includes extracts from Beth’s notebooks and diaries bringing Beth’s own distinctive and much loved voice into the book.

Catharine Horwood is giving a talk at the Hertfordshire Hardy Plant Society meeting on Saturday 4th January at 2.00pm at the Memorial Hall, Marford Road, Wheathampstead,AL4 8AY

Entrance fee for visitors £5.

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Meeting 3 December

For our last meeting of 2019, the Society welcomed Chris Bryant the Retail Manager of Ayletts Nursery to talk about some of the most popular selling plants during the pre Christmas period. His talk included some useful tips on ensuring plants thrive indoors during the winter season.

Some top sellers include Japanese and Indian varieties of azaleas . The Indian varieties are not hardy. Azaleas need constant watering. Ideally rainwater. Fast growing in a warmer atmosphere.

Ayletts grow over 4,500 Poinsettias each year for Christmas purchases. It is important for the plants to be wrapped before leaving the shop (Ayletts do this but not in many other outlets) as they will not fare well in a sudden drop in temperature. Indoors must not be placed near radiators and no drafts.

Peace Lillies can be grown successfully in darker areas and can clean the air, Particularly good for an office environment.

Indoor Jasmine is very popular with their fragrancy and masses of white flowers. Can be cut back by a third in July to encourage more flowers.

Palms are easy to maintain and should be turned when watered. A short spray is ideal to stop the tips going brown.

African Violets can cope with neglect! Blue varieties are stronger than white or pink varieties. To propagate just cut the leaves and place in water and watch the roots grow. Easy!

Ayletts grow over 3,500 cyclamen each year. Need to be kept in a cool environment. Not so good in modern centrally heated modern houses. Water from underneath and take care the corms if too wet are subject to rotting.

Orchids have grown in popularity over the years as they are now grown in large numbers in the UK. Feed via the leaves. When flowering is finished the stems should be cut above a leaf node but not too far down the plant.

Christmas Cactus prefer a shady place and it is important not to change the position of the plant. They can be put outside when temperatures rise but again place in a shady place.


Lastly this year the amaryllis bulbs can now be bought with an amaryllis printed Christmas jumper….hurry while stocks last!

Ayletts have been in business for 66 years and for those that don’t know it the sat nav reference is AL2 1DH, Telephone 01727 822255.


The next meeting of the Harpenden Gardening Society is on Tuesday 11 February when our guest speaker will be Dr Ian Bedford who will tell us everything we need to know about SLUGS !

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Meeting 12 November 2019

We were delighted to welcome once again our guest speaker Matthew Biggs, author and broadcaster last night to talk about ‘Secrets of Great Botanists’. The last time we met him he was on the panel of Gardeners Question Time when the Society hosted the broadcast from Park Hall in December 2015.

Matthew chose four leading botanists and plant finders through the centuries to illustrate his talk. First being Leonhart Fuchs who first made his name in botany with the publication of his 1542 De Historia Stirpium (Notable Commentaries on the History of Plants) One of the most beautiful books ever printed due to its exquisite hand coloured drawings. It was also the first time that many species from the New World were featured in Europe for the first time including widespread plants like tomatoes, potatoes, corn and chillies.

He gained a BA at 14 and studied physics, philosophy and medicine in Bavaria. Fuchs first found fame for the fatal English sweating disease using plants including rosemary and various types of gentian. Many years after his death in 1566 the fuchsia was named in memory of him.

When Philibert Commercon joined Louis-Antoine de Bougainville’s 1776 expedition to circumnavigate the world he took Jeanne Baret his housekeeper/lover and botanical assistant with him disguised as his male valet! In those days women were not allowed to travel on these voyages. She therefore became the first woman to circumnavigate the globe and proved herself a resilient and intrepid plant collector and plant hunter  due to her knowledge of medicinal plants. Among her discoveries in the forests of Brazil was the famous Bougainvillea spectabilis. Jeanne Baret has only recently been commemorated through the name of the plant.

William Dampier(1651-1715) on leaving school became apprenticed to a seaman in Weymouth, fought briefly in the Anglo-Dutch War was employed on a Jamaican sugar plantation, traded in dye in Mexico. His pay was so bad he became a pirate raiding through Spanish towns along the coast of Mexico. He made enough money to return to England and marry. Dampier travelled widely across the Pacific, the South China Sea, the coasts of South East Asia. He was the first seventeenth century Englishman to navigate the globe. To capitalise on his now notoriety he published a book ‘A new voyage around the world’ giving a detailed description of the flora and fauna and people he encountered on his travels. In all he circumnavigated the world three times. Collected plants from Australia 71 years before Cook arrived. He was the first to describe Breadfruit in English described the Galapagos turtles before Darwin and produced the first recipe for guacamole!

George Forrest (1873-1932) was a robust, fearless Scotsman who started life working in a chemist shop producing herbarium specimens before moving on to the Royal Botanic Garden in Edinburgh. A wealthy Liverpudlian Arthur Bulley was recommended to hire George to collect plants for his garden from the mountains of Yunnan in China. A year into his time in China violence broke out causing him to flee for his life. Over the coming days he avoided capture and certain death by scrambling over precipitous mountainous terrain and wading through water to leave no tracks for his pursuers. Lesser men would not have wanted to ever return to China but Forrest returned 7 times over 28 years mainly to Yunnan province which is so rich in flowers. He introduced over 1,200 new species. Among them were 509 rhododendrons ,over 50 primulas to the excitement of botanists. Most of his letters and artefacts are stored in the archives at the Royal Botanic Garden in Edinburgh.

Matthew provided us with a fabulous, stimulating and exciting insight into the intrepid and often swashbuckling world of four of our greatest botanists who pioneered the discovery of thousands of plants we enjoy in our gardens today.


Matthew’s book, RHS ‘The Secrets of Great Botanists’ illustrated with beautiful period botanical watercolours and vibrant photographs is published by Mitchell Beazley and is available in all good book shops at £15.99

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Meeting 10th September 2019

Our first meeting of the Autumn season was a fascinating talk and slideshow presented by Paul Barney of Edulis Nursery in Pangbourne, Berkshire.

Paul’s nursery grows an eclectic range of rare plants including a large selection of unusual and edible plants including alliums, brassicas, gingers, mostly hardy and easy to grow which you won’t find in your local garden centre!

The Nursery supply many top restaurants including Le Manoir with produce also Buckingham Palace.

Fascinated by the great nineteenth century plant hunter Frank Kingdon Ward, Paul has travelled far and wide throughout  India, Burma (now Myanamar) China and South America in his search for rare and exotic plants.

In Paul’s talk he concentrated on a visit to Northern India where he explored the mountainous and lush forests retracing the earlier journey of Frank Kingdon Ward’s quest to find the ‘wild tea’ plantations.

Living roughly and with a team of local sherpas Paul found an amazing range of edible plants which are eaten every day by the local population. Their daily diet contains very many more and a greater variety of vegetables than diets in the West.

The colourful slideshow featured an array of unusual plants most of which have never been seen in the West. The evergreen  sausage vine so called as it’s fruit looks just like a string of sausages but has a taste between melon and a pineapple! Chilli guavas and the Nagar chilli which is the hottest. The allium hookeri whose attractive creamy flowers are also edible and used in bhajis as a substitute for onions. The bees love the flowers.

Many peppers are grown including the lemon pepper very similar to sechuan pepper commonly used in Asian cooking.

In Naga land in Northern India where English is widely spoken (due to the early English Christian missionaries) they have a novel way of growing cabbages. They insert stalks into the gaps in walls which keeps them clear of flooding whilst enhancing the appearance of the walls!

For further information on these incredible edibles contact Paul via his website or

The next Harpenden Gardening Society meeting will be on Tuesday 8th October (8.00pm at Roundwood Park School) featuring a talk on ‘Death in the Garden’ about poisonous plants by the well known Horticulturalist Author and Historian Michael Brown.

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Meeting May 14 2019

Timothy Walker the well known Botanist and of late the Director of the Oxford Botanical Garden returned to us once again to deliver a hugely entertaining and informative talk on ‘how to be a successful 21st Gardener’ !

Soil….the UK has the best … can improve it but not change it! Starting afresh on a new garden, 3 spits deep is the way to get rid of all weeds to ensure a sterile plot. Best to shred compost so it degrades equally and keep wet to improve the soil. On a winters morning when you see the compost steaming you know you have done your job well!

Plants…..there are 70,000 in the UK to choose from. If you are unsuccessful growing a particular plant give up as it for some reason does not work in your garden!

British native plants….honeysuckle, hawthorns, viburnums ..all good for encouraging British native wildlife.

Raise new plants in loam based compost. From next year peat will no longer be available.

New plants should be watered (rain water not tap water) in thoroughly . This will ensure the roots grow downwards where the soil is always moist. Once planted Timothy never ever waters plants again even in the driest of conditions.

Given the changing climate and weather conditions many species are blooming earlier. Snowdrops are flowering 21 days earlier than in 2004.

It is now even more important that children become the new gardeners in the 21st century considering the changes taking place. They are ideally suited given they are the right height to trim lavender hedges and plant flowers and vegetables!

The next meeting after the Summer break will be on 10 September when our guest speaker is Paul Barney from Edulis Nursery who will be discussing ‘unusual edibles’ and will be bringing plants for sale.


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Meeting 9 April 2019

Graham Austin of Home Farm Plants in Bovingdon was our guest speaker for the third meeting of 2019. Graham’s talk was entitled ‘Success with Delphiniums’ and provided a master class on the propagation and growing and showing of Delphiniums.  His nursery grows everything from seed, nothing is brought in.

The majority of garden centres sell ‘Pacific Giant’ delphiniums originally bred in California. This species are annual and do not survive in cold conditions.

Only Elatum delphiniums will thrive for many years given the right growing conditions. They are good and hardy and are not affected by colder weather but they must be given good drainage.

The hard crown must be cut to take cuttings and should be thinned to no more than 3 shoots shoots in the first year. Feeding after thinning is important to ensure good growth. To deter slugs sharp sand in generous quantities should be heaped around each plant. Plants less than 12 inches high should  be staked early with 3 canes around each plant. Organic slug pellets can still be used but sprinkled around the plant but not to use too many. Nematodes mixed with water and compressed wool are other options.

Some favourite named delphiniums available from the nursery are as follows:

Blue Nile, a true blue variety.

Sandpiper Floret , white

Cassius can grow to 8 ft.

Bruce, purple 6-8ft

Butterball, cream

Darling Sue, white 4-5ft

Vanessa Mae blue and stripey

Elizabeth Cook, white ‘rosebud’

Ruby wedding new exciting cranberry colour

Boadicea new variety 5-6 ft

For further information contact Graham on 07773 798068 or via the website:

The next meeting of the Society at Roundwood Park School will be on 14 May when one of our favourite and popular speakers, Timothy Walker the Botanist and Author, will talk about ‘How to be a 21st Century Gardener’

We look forward to welcoming members and visitors then.

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Meeting 12 March 2019

Patricia Fox of Aralia  Design based in Sawbridgeworth was our guest speaker this evening.

Her talk centred on small garden designs and what NOT to do!

Examples of her work using a selection of her recent innovative designs took us on a tour of a series of high end properties in London including Knightsbridge and Regents Park.  Chelsea Creek on the River Thames too!

The roof terrace gardens were quite stunning. Using an array of dramatic glass art, creative lighting, striking pergolas and bespoke garden furniture blending in to the space available. Unlikely the items could  be purcased in B&Q or Homebase!

With several ‘before and after’ shots , many small spaces were long and narrow but with careful design and judicious planting schemes and landscaping created a totally different and pleasing look.

In small spaces it is important to blur the edges to make the garden seem larger than it actually is. Fences must be hidden with  hedging, climbers or trees. It is important when using different materials like tiles, stones, planters or wooden frames to maintain the same colour palette throughout.

Bright flowers , reds/orange /yellow should be placed nearer to the house and less vibrant paler colours should be planted further away to create  spaciousness.

Aralia have won many awards for innovative and creative gardens from small urban gardens, modern contemporary gardens as well as traditional gardens in the country.

For further information (and you don’t have to own a penthouse with a roof terrace!) contact : info or telephone 01279 721461

The next meeting of the Society is on the 9th of April when Graham Austin of Home Farm Plants will be talking about delphiniums. He will be bringing along plants for sale.


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Meeting 12 February 2019

The Society’s first meeting of the year got off to a spectacular and colourful start with our Guest Speaker, the Broadcaster Howard Drury.

Howard, a veteran of 611 episodes over 11 years of Central TV’s popular ‘Gardening Time’ programme as researcher and presenter held members and guests in awe with his masterful presentation and stunning slide show accompanied by music!

Howard’s talk encompassed a whole range of excellent gardening tips and advice honed over many years of gardening trial and error working with Nurseries and plant growers, often at variance with established RHS guidance! Gardening is not an exact science!

Too many of the hundreds of his gardening tips to list here but here are a few  worth recording for posterity!

When growing orchids it is important that roots can see daylight. In their natural habitat orchids are fertilised by parrot droppings which the rains then wash  around the plants. Given we have few parrots available in the UK, special orchid fertilisers mimic nature’s way!

To preserve and extend alstromerias flowering season stalks should be pulled out and never cut.

New species of dwarf buddlias are increasing in popularity as they are sterile and do not reproduce seedlings and they are very attractive to bees. As are all cone and single flowers as opposed to newer varieties of double flowers which make it difficult for bees to pollinate.

Composting around roses in the winter months helps to delay black spot reappearing on new leaf growth.

Howard never uses a rotavator as he believes it destroys the structure of the soil.

Looking to the future the rapid development in battery technology will mean petrol engines in gardening equipment will be redundant in 5 years time which will make life easier for all especially the more mature gardener!

A new moss treatment developed in Belgium will be launched later this year which Howard has already witnessed does actually kills moss within the hour!

Tomatoes are even now being  grown underground in the Middle East using LED lighting providing a pink glow 24/7. The futures bright, the futures pink but the tomatoes are still red when ripe!

To find out more of Howard’s gardening tips and ideas visit his website :

The next meeting of the Society is Tuesday March 12 when Garden Designer Patricia Fox will talk about creating drama and structure in the small garden (What NOT to do!)





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