Tag: Gardeners Question Time

August 2023: Gardeners Question Time

The panel this year consisted of the CABAHS President, Sir Nicolas Bevan in the chair along with the well known horticulturalist, retired Greenwich Park Manager and teacher, Joe Woodcock and our own knowledgeable CABAHS member, Pat Kane. It was a jolly affair much enjoyed by the members, held in the Old Library at Charlton House because of the possibility of rain.

Introduction to GQT by Chair
Our GQT Panel
Introduction to GQT by Chair - different view
Joe Woodcock answering a question
GQT audience
Joe Woodcock giving a demonstration

Before the meeting, some members visited the Old Pond Garden to check on and discuss progress.

Continue reading August 2023: Gardeners Question Time

GQT Follow-up question

As always, we didn’t get around to answering all your questions at our August GQT meeting (I’m very sure they don’t manage to on the radio programme either!). But you may remember that Annie H brought in her strange distorted tomatoes to show everyone. If it had not been for the biblical deluge, I expect we would have had a good discussion about them.

Distorted tomatoes
Annie H’s weird tomatoes!

Annie was undaunted by getting no answers at the meeting, and contacted the RHS directly. She says, “I was informed that the most likely cause was a too high concentration of a contaminated farmyard manure compost in the pots. The farmers spread weedkiller/ pesticide on the field, the grass grows and the cattle dump cowpats which are composted and then bagged up for sale but still contains residues of weedkiller/ pesticide.”

Thank you for this Annie, something for us all to watch out for. It would be interesting to hear from other members if they have had a similar experience.

Kathy

August 2022: Gardeners Question Time

Members meeting in the gardens
Members meeting in the gardens

Our annual amateur Gardeners Question Time meeting was once again held in the Peace Garden at Charlton House. Some members will remember last year, when everyone was in thermals and anoraks and it was the coldest August evening for years – ah, not this year we thought, it has been so warm and dry for weeks! Well, best laid plans as they say. Everyone was settled and happily getting in to the swing of questions about the drought. And so of course, the heavens opened!

Members being rained on, running for cover
Terry in the rain

True to type, we gardeners just picked up our things and decamped to Frilly’s Tea Room for a little break. Thank you to our stalwart committee and helpers who covered things up in the garden (do you know what Doritos and Pringles look like when they are soaked? ugh!). As the thunderstorm carried on, so too did we and the questions continued in the Tea rooms.

GQT in the tea rooms

Thank you to our panel, especially guest panellist Joe Woodcock, for cheerfully answering our questions, and to Charlton House for letting us drip all over their cafe. It was still a very enjoyable evening, but sad that not many members saw the old Pond Garden in the dusk, lit up with solar lights and looking magical.

Dusk in the OPG
Dusk in the OPG

The committee will be having a think about whether to have next years GQT meeting in the safety of the Old Library!

Kathy A

August 2021: Amateur Gardeners Question Time “GQT”

Our amateur “GQT” was attended by over 50 members and OPG volunteers and was held outside, in the Peace Garden behind Charlton House.  Our president, Sir Nicolas Bevan, introduced the panel experts – guest panellist Joe Woodcock, plus Vija Vilcins and Pat Kane. It was an exceptional meeting.  As Sir Nicolas said, this was the first time members have met face-to-face since the beginning of the pandemic. To celebrate this it was also a social event with wine and nibbles provided – and appreciated!

Questions and Answers

Q1
Stella B: I would be grateful for some suggestions for a small or medium sized tree for my back garden. It’s a ’coming along’ garden begun a couple of years ago. There are now 3 apple trees (2 half standards and one espalier), so not another fruit tree. I really need it for some screening (it’s a terrace house) so maybe 12-15ft full grown? Not too wide a spread.

Q1 ANSWERS:

a) Joe: 

i) Although Stella was not keen on fruit trees the crab apple would be a good tree. e.g. Malus ‘Red Sentinel’ with its wonderful golden leaves.

ii) Japanese maples (Acers) e.g. Senkaki with  its yellow leaves in summer and its beautiful golden tints in autumn when its leaves become tinged with pink. Or Acer palmatum ‘Garnet’, a low growing acer.

iii) Rowans such us Sorbus acuparia and Sorbus ‘Joseph Rock’,  yellow flowers with superb autumn colour.

iv) The Handkerchief Tree (Davidia involucrata).  But maybe too large if the garden is small.

v) The Fox Glove Tree (Paulownia tomentosa).  Because it grows into a large tree, buy it young and coppice it. It will then grow into a low growing shrub with very large leaves.

b) Pat:

i) The Paper Bark maple ( Acer griseum) and the Snake Bark Maple(Acer capillipes).

ii) Amelanchier lamarkii.

iii) Prunus ‘Snow Showers’ which hangs down.

c) Viya:

i) Amelanchier.

ii) Cornus canadensis.

iii) Cercis canadensis ‘Forest Pansy’ with burgundy leaf.

Q2
Chris B: I was given a Geoff Hamilton rose at the end of May and it flowered beautifully, but there have been very few flowers since then. It is supposed to be a repeat flowerer. Is there anything I can do to encourage more roses?

Q2 ANSWERS:

a) Joe:
It’s a modern shrub rose. If bought in a pot it needs time to establish. The roots need tweaking out before planting and it needs time to acclimatise  to the soil and develop the  energy  for flowering and will very likely  flower better next year  when it has had time to acclimatise. In spring give it a mulch  and feed it with Tomorite.

b) Viya:
Referring to roses in pots she said she had  kept an Emma Hamilton rose in a pot and it needed a regular feed  because the soil gradually lost its nutrients.

Q3
Pat K: I’ve got scale insects on the trunk of my Viburnum bodnantense Dawn. It’s planted in a pot as no room in the garden. The best way to get rid of it without any chemicals, please?

Q3 ANSWERS:

a) Joe:
Using cotton buds with methylated spirit, and squish them! Systemic fertilisers have been mostly withdrawn nowadays. Ants may form nearby which harvest them, but they are harmless.

b) Viya:
She said she has used a fingernail scrub. A labour of love. But they didn’t come back.

Q4
Carolyn H: My clematis (several varieties) are covered in black fly this year. The flowers are also being eaten. Are these two problems related? Is it a particular problem this year? How can I prevent it happening in future. Three questions actually!

Q4 ANSWERS:

a) Joe:
He said that his clematis were the best they have ever been this year! But the black fly problem may be due to the weather conditions this year. Use a hosepipe to wash them off or squash them with your fingers. If you use chemicals use a fatty acid one not a systemic . They may have been eaten by slugs and snails. Well known ways of getting rid of these include using egg shells, beer traps and   wool. Also there is the book ‘50 ways to Kill a Slug’ by Sarah Ford.

b) Pat:
Go out at night with a torch and pick them off.

Q5
Kathy A: Do you have any suggestions or rules for how to space perennial plants out in a herbaceous border? I always start off ok but by about now everything looks squashed and lots of fighting for space going on. I was always told not to leave bare soil between plants as then you get weeds, but I don’t seem to be able to find that happy medium.

Q5 ANSWER:

a) Joe: I do the same. I suggest you cut back the thuggish plants in summer and make space for others. If it is a new border plant in odd numbers e.g. 3, 5, 7 etc. Fergus Garrett at Great Dixter has produced a video showing how to space out plants.

Q6
Melanie A:  I would appreciate some suggestions for plants to go in a shared space. This is the scenario: our houses are fortunate to share a fairly large open space for which the householders are jointly responsible. We keep maintenance costs to the minimum by doing much of the work ourselves. Some of the trees planted many years ago by some householders help shield us from the horrors beyond, but they cast a lot of shadows. It would be great to have some thoughts  on how to put some items of interest in this space, something that can’t be mistaken for lawn by enthusiastic mowers.

Q6 ANSWERS:

a) Joe:
In shaded areas plant Mahonia, Camellia, Elaeagnus and in damp shade ferns e.g Dryopteris wallichiana and Dryopteris filix-mas. Also plant in groups: Epimedium , Pachysandra terminalis, Pulmonaria  ‘Sisinghurst White’. Foxgloves (Digitalis) and Japanese anemones(e.g.Honore Joubert) to show up in the shade. Spring bulbs like Tulip Red Riding Hood and Tete-a-tete.

b) Viya:
Miscanthus which initially only needs minimal watering just to get it going. Also Nandina domestica and Hydrangea ‘Vanilla Phrase’.

Q7
Angela B: Have you any suggestions for getting rid of pond duck weed?

Q7 ANSWER:

a) Joe: You can never get rid of duck weed. But use waders and a metal rake to clear it. Do leave it on the side for a day so that any organisms in it that need to live  in the pond can return to it. Also, if new, place your pond near a bit of shade. Put in oxygenators and pond plants that will help maintain a balance such as irises and marsh marigolds(Caltha palustris). Try to maintain at least one third cover with lilies and marginals. Also a fountain would be useful.

Q8
Anne R:  I have a Sorbus (Rowan)  which I think is Sorbus ulleungenis ‘Olympic Flame’.  It’s about 8 years old and still quite small and every year some of its growth dies back. It’s in a north-by-northwest  garden, so it gets some sun, on heavy clay but well drained. Am I doing something wrong or is it the wrong tree for the space. I know I’m not the only person with a die-back problem I saw a Sorbus in Greenwich Park recently with the same problem.

Q8 ANSWER:

Joe: The rooting of Sorbus is vulnerable to extremes of environmental conditions. It doesn’t like heavy wet soil in winter and cracked soil in summer. Take a garden fork and lift and reduce compaction around the roots. Waggle the fork in the roots (“terra vent”). Mulch in winter. Monitor the tree and cut out dead wood.

Angela