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Summer Garden Party RHS Wisley: Show 2

Kathy Clugston and the panel answer questions at the GQT Summer Garden Party on growing a clementine from pips, unusually shaped cacti, and using an unheated greenhouse in winter.

Kathy Clugston hosts the second of the Gardeners’ Question Time Summer Garden Party specials from RHS Garden Wisley in Surrey.

Joining Kathy are Pippa Greenwood, Matthew Wilson, Marcus Chilton-Jones and Dr Chris Thorogood, taking questions from an audience of keen gardeners gathered beneath the marquee at the Wisley Flower Show.

The panel share the gardening lessons they wish they’d learned sooner, help a young gardener who has successfully grown a clementine from pips and work on solving the mystery of some unusually shaped cacti.

There are also recommendations for planting up a sunny pergola, making the most of an unheated greenhouse through winter, and advice on how to treat against some unknown pests leaving marshmallow like residues on a well loved Hydrangea.

And to conclude, the panel almost break into song as they are asked if there is any music that inspires them to garden.

Producer: Alison Vernon-Smith
Assistant Producer: William Norton

A Somethin' Else production for BBC Radio 4

* If listening on BBC Sounds and you wish to view the plant list, please go to the Gardeners' Question Time website and open this week's episode page.

Available now

28 minutes

Featured

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Plant List

1. I'm in my first year of having a garden. What is one thing you wish you'd known when you first started gardening? (03’16”)

2. Can I propagate and divide my large clump of Crocosmia ‘Lucifer’? (06’38”)

Marcus Chilton-Jones

• Crocosmia ‘Lucifer’, crocosmia 'Lucifer' 

3. I grew a clementine from seed. How can I help it fruit?(08’45”)

Pippa Greenwood

• Citrus spp., citrus• Carica papaya, papaya• Mangifera indica, mango

Dr Chris Thorogood

• Citrus limon, lemon• Ananas comosus, pineapple• Zingiber officinale, ginger

Matthew Wilson

• Castanea sativa, Sweet Chestnut• Pine spp., Pine

4. How can I make sense of large gardens and understand the planting? (14’10”)

Dr Chris Thorogood

• Agapanthus ‘Fireworks’, African lily 'Fireworks'

No other specific plants were discussed in this question.

5. What can I plant on a south-facing pergola instead of the usual wisteria, roses and jasmine? (19’52”)

Matthew Wilson

• Vitis coignetiae, crimson glory vine

Marcus Chilton-Jones

• Clematis armandii ‘Apple Blossom’, evergreen clematis 'Apple Blossom'• Parthenocissus henryana, Chinese Virginia creeper

Dr Chris Thorogood

• Aristolochia tomentosa, Dutchman’s pipe vine• Cobaea scandens, cup-and-saucer vine

Pippa Greenwood

• Passiflora spp., passion flower• Cucurbita spp., squash• Cucurbita spp., ornamental gourd 

6. What can I grow in an unheated greenhouse over winter? (25’49”)

Marcus Chilton-Jones

• Brassica rapa subsp. chinensis, pak choi• Brassica juncea, mustard greens• Salad leaves (mixed leaves not specified)

Pippa Greenwood

• Lactuca sativa, lettuce• Cichorium intybus (Radicchio Group), radicchio

Existing greenhouse crops mentioned

• Solanum lycopersicum, tomato• Capsicum spp., chilli pepper• Cucumis sativus, cucumber 

7. Why are my cacti developing thin stems with swollen tops and falling over? (29’13”)

Dr Chris Thorogood

• Opuntia spp., prickly pear cactus• Mammillaria spp., pincushion cactus

8. My treasured hydrangea has small marshmallow-like growths all over it. What are they? (34’15”)

Pippa Greenwood

• Hydrangea spp., hydrangea 

9. Is there a piece of music you associate with gardening or particular plants? (36’12”)

Dr Chris Thorogood

• Brassica oleracea (Capitata Group), cabbage• Brassica oleracea (Botrytis Group), cauliflower

Referenced through the childhood song: "Cauliflower's fluffy and cabbage is green."

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