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Solenostemon
Final Trials Report
2013
Trials Office The Royal Horticultural Society Garden, Wisley, Woking, Surrey, GU23 6QB
Final Report for Trial No. 1949 – Solenostemon 2013 1
RHS Trial of Solenostemon
Introduction to Solenostemon Solenostemon is a genus of around 60 species of evergreen, bushy subshrubby perennials from the forests of tropical Asia. They are mainly cultivated for their brightly coloured foliage, but produce raceme-like whorls of tiny flowers all year round which are often removed. For this trial, they were used as patio container plants and as summer bedding, although they can be grown as glasshouse plants. Outside, grow in humus rich moist but well drained soil enriched with well rotted organic matter. They prefer a sheltered position in full sun or partial shade. Water freely in dry conditions and pinch out young shoots to promote bushy growth. Objectives The objectives of the trial were:
To assess for suitability for outdoor summer displays in open areas and patio containers
Recommend plants for Award of Garden Merit Judging The Solenostemon Trials Assessment Forum assessed entries in the trial monthly between July and October 2013 at Wisley and made two visits to Victoria Embankment Park in July and September using the following criteria:
Quality of foliage
Vigour
Pest and disease resistance
Hardiness
Longevity
Stability
Fade resistance Entries There were 92 entries in the trial at Wisley, 6 plants grown in the open ground and three in a container of each, submitted as plugs, unrooted cuttings and seed by breeders and nurseries in the UK and Europe. In London there were 14 entries gown as plants. Cultivation Seed was sown in mid-March into cells: 14 cells per entry with two seeds per cell. The tray was placed onto a bench heated to 24oC and misted every 30 minutes. Once germinated, seeds were then thinned to one seedling per cell. Twelve plants per entry were then potted into 9cm pots. Cuttings were placed into trays with cells and placed onto a bench heated to 24oC and misted every 30 minutes. The mist was then removed and trays covered in fleece. Plants were potted on to 9cm pots and removed from the heated bench. Plants were pinched. The trial bed was prepared using landscape fabric to cover the soil to stop weeds. Plants were planted in the ground through the landscape fabric on 24 June in two rows with 40cm between plants and 60cm between entries. Containers were planted up with three plants per entry on 26 June and placed on the field the next day. The
Final Report for Trial No. 1949 – Solenostemon 2013 2
trial was irrigated using drip irrigation to both containers and plants in the ground. The front row of plants in the ground were pinched at regular intervals to restrict flowering. Pest and Disease There was very little encountered during the trial. Following a wet spell at the end of September some entries had suspected stem rot. Entry 29 suffered some damage caused by a badger when it got under the fence, which was subsequently reinforced. Other Findings The very hot weather during July was not beneficial to the plants. The bed was in a very exposed, south facing position at Wisley and the leaves of many entries were bleached by the continued direct sunlight and some entries suffered from scorch. The Forum considered the two sited trial very beneficial as the site in London was more shaded and leaves didn’t bleach to such an extent as at Wisley. It also gave the opportunity to assess varieties that did not have an entry at all, or not a complete entry at Wisley.
Plants Receiving AGMs During Trial The following are the plants thought to fulfil the Award of Garden Merit criteria during the trial and to be worthy of receiving the award. The criteria which a plant needs to fulfil in order to receive the award are:
excellent for ordinary garden use
available
reasonably resistant to pests and diseases
of good constitution
essentially stable in form and colour
reasonably easy to grow Hardiness ratings are as follows: H1c – Can be grown outside in the summer throughout most of the UK while daytime temperatures are high enough to promote growth.
Plants Awarded AGM
Solenostemon ‘Black Prince’ AGM (H1c) 2013 [Trial No. 2] Height: 60-75cm ; Spread: 45-50cm Comments: “Nice iridescence. No scorch. Good dark colour. Best of purples.” Sent by Elsner PAC
Final Report for Trial No. 1949 – Solenostemon 2013 3
Solenostemon ‘China Rose’ AGM (H1c) 2013 [Trial No. 5] Height:45cm ; Spread: 45cm “Strong markings. No flowers. Vigorous. Excellent.” Sent by Dibleys
Solenostemon ‘Gay’s Delight’ AGM (H1c) 2013 [Trial No. 12] Height: 50-60cm ; Spread: 45-60cm “Comments: Unusual colour. Consistent. No flowers.” Sent by Ball Colegrave Ltd
Solenostemon ‘Winsome’ AGM (H1c) 2013 [Trial No. 13] Height:70cm ; Spread: 50cm “Fantastic. Love variation of colour. Done well throughout sun.” Sent by Dibleys Nurseries
Solenostemon [Henna] = ‘Balcenna’ PBR AGM (H1c) 2013 [Trial No. 14] Height: 55-70cm ; Spread: 35-40cm “Standing up top heat well. Outstanding. Distinct. Vigorous.” Sent by Ball Colegrave Ltd
Final Report for Trial No. 1949 – Solenostemon 2013 4
Solenostemon [Redhead] = ‘Uf0646’ PBR AGM (H1c) 2013 [Trial No. 22] Height:45-60cm ; Spread: 60-70cm “Fading gives depth. Amazing. Striking colour. Outstanding.” Sent by Ball Colegrave Ltd
Solenostemon Solenostemon [Versa Crimson Gold] = ‘Pas733805’ (Versa Series) AGM (H1c) 2013 [Trial No. 67] Height: 65cm; Spread: 45-55cm “Consistent. Very good. Not flowering.” Sent by Ball Colegrave Ltd
Solenostemon ‘Juliet Quartermain’ AGM (H1c) 2013 [Trial No. L3] Height:70-90cm ; Spread: 60cm “Red foliage, good colour. Robust. Compact. Done well. Filled space.” Sent by Kernock Park Plants
AGM Subject to Availability
Solenostemon ‘Alabama Sunset’ AGM (H1c) 2013 [Trial No. 78] Height: 30-60cm ; Spread: 40-60cm “Very uniform. Like bright new growth. No flowers.” Sent by Jaldety
Final Report for Trial No. 1949 – Solenostemon 2013 5
Solenostemon ‘Glennis’ AGM (H1c) 2013 [Trial No. 82] Height: 60-90cm ; Spread: 40-60cm “Interesting colour. Like green under leaves. Unique colour combination. No flower.” Sent by Jaldety
Reconfirmed AGMs
Solenostemon ‘Pink Chaos’ AGM (H1c) 2013 [Trial No. 20] Height: 30cm ; Spread: 30cm “Unique. Cracking plant. Very pink. Outstanding colour. No flowers.” Sent by Dibley’s Nurseries
Solenostemon [Trusty Rusty] = ‘Ufo6419’ PBR AGM (H1c) 2013 [Trial No. 29] Height:45-60cm ; Spread: 60-70cm “Bold leaf. Outstanding. Very consistent. May be better in part shade.” Sent by Ball Colegrave Ltd
Solenostemon ‘Pineapple Beauty’ AGM (H1c) 2013 [Trial No. L15] Height: 50-90cm ; Spread: 30-50cm “Good branching and habit. Like upright leaves. Texture useful. Consistent.” Sent by Kernock Park Plants
Final Report for Trial No. 1949 – Solenostemon 2013 6
Trial Index and Senders’ Details
Entries at Wisley
Name Sender
1 S. [Alligator Tears] = 'Uf084323' (Colourblaze Series) Elsner PAC
2 S. 'Black Prince' AGM (H1c) 2013 Elsner PAC
3 S. 'Brilliant' Dibleys Nurseries
4 S. 'Caipirinha' Elsner PAC
5 S. 'China Rose' AGM (H1c) 2013 Dibleys Nurseries
6 S. 'Combat' AGM (H1c) 2012 Dibleys Nurseries
7 S. 'Combat' AGM (H1c) 2012 Ball Colegrave
8 S. 'Combat' AGM (H1c) 2012 Jaldety
9 S. 'Crimson Velvet' Ball Colegrave
10 S. 'Dipped in Wine' Elsner PAC
11 S. 'Firelight' Dibleys Nurseries
12 S. 'Gay's Delight' AGM (H1c) 2013 Ball Colegrave
13 S. 'Winsome' Dibleys Nurseries
14 S. [Henna] = 'Balcenna'PBR AGM (H1c) 2013 Ball Colegrave
15 S. 'Kentish Fire' Dibleys Nurseries
16 S. 'Kiwi Fern' (Stained Glassworks Series) Dibleys Nurseries
17 S. 'Muriel Pedley' Dibleys Nurseries
18 S. 'Peter Wonder' Ball Colegrave
19 S. 'Peter Wonder' Jaldety
20 S. 'Pink Chaos' AGM (H1c) 2012 Dibleys Nurseries
21 S. 'Red Angel' Dibleys Nurseries
22 S. [Redhead] = 'Uf0646' PBR AGM (H1c) 2013 Ball Colegrave
23 S. 'Roy Pedly' AGM (H1c) 2012 Dibleys Nurseries
24 S. 'Saturn' Dibleys Nurseries
25 S. 'Saturn' Ball Colegrave
26 S. 'Saturn' Jaldety
27 S. 'Sky Fire' Elsner PAC
28 S. [Spitfire] = 'Uf072405' Elsner PAC
29 S. [Trusty Rusty] = 'Uf06419' PBR AGM (H1c) 2012 Ball Colegrave
30 S. 'Green Chartreuse' AGM (H1c) 2013 Dibleys Nurseries
Final Report for Trial No. 1949 – Solenostemon 2013 7
31 S. [Kong Green] = 'Kakegawa Ce16' (Kong Series) Ball Colegrave
32 S. [Kong Mosaic] = 'Kakegawa Ce15' (Kong Series) Ball Colegrave
33 S. [Kong Red] = 'Kakegawa Ce12' (Kong Series) Ball Colegrave
34 S. [Kong Rose] = 'Kakegawa Ce14' (Kong Series) Ball Colegrave
35 S. [Kong Salmon] = 'Sakcol017' (Kong Series) Ball Colegrave
36 S. [Kong Scarlet] = 'Kakegawa Ce13' (Kong Series) Ball Colegrave
37 S. [Wizard Coral Sunrise] (Wizard Series) Ball Colegrave
38 S. [Wizard Golden] (Wizard Series) Ball Colegrave
39 S. [Wizard Jade] (Wizard Series) Ball Colegrave
40 S. [Wizard Mosaic] (Wizard Series) Ball Colegrave
41 S. [Wizard Pastel] (Wozard Series) Ball Colegrave
42 S. [Wizard Pineapple] (Wizard Series) Ball Colegrave
43 S. [Wizard Scarlet] (Wizard Series) Ball Colegrave
44 S. [Wizard Sunset] (Wizard Series) Ball Colegrave
45 S. [Wizard Velvet Red] (Wizard Series) Ball Colegrave
46 S. 'Fairway Mosaic' (Fairway Series) Sakata Ornamentals
47 S. 'Fairway Orange' (Fairway Series) Sakata Ornamentals
48 S. 'Fairway Red Velvet' (Fairway Series) Sakata Ornamentals
49 S. 'Fairway Rose' (Fairway Series) Sakata Ornamentals
50 S. 'Fairway Ruby' (Fairway Series) Sakata Ornamentals
51 S. 'Fairway Yellow' (Fairway Series) Sakata Ornamentals
52 S. 'Superfine Rainbow Colour Pride' (Superfine Rainbow Series) Sakata Ornamentals
53 S. 'Superfine Rainbow Festive Dance' (Superfine Rainbow Series) Sakata Ornamentals
54 S. 'Superfine Rainbow Red Velvet' (Superfine Rainbow Series) Sakata Ornamentals
55 S. 'Superfine Rainbow Volcano' (Superfine Rainbow Series) Sakata Ornamentals
56 S. [Giant Exhibition Limelight] (Giant Exhibition Series) Takii Europe BV
57 S. [Giant Exhibition Magma] (Giant Exhibition Series) Takii Europe BV
58 S. [Giant Exhibition Marble] (Giant Exhibition Series) Takii Europe BV
59 S. [Giant Exhibition Multicolour] (Giant Exhibition Series) Takii Europe BV
60 S. [Giant Exhibition Palisandra] (Giant Exhibition Series) Takii Europe BV
61 S. [Giant Exhibition Rustic Red] (Giant Exhibition Series) Takii Europe BV
62 S. 'Dark Chocolate' Ball Colegrave
63 S. 'Chocolate Covered Cherry' Ball Colegrave
64 S. 'Chocolate Mint' Ball Colegrave
Final Report for Trial No. 1949 – Solenostemon 2013 8
65 S. 'Chocolate Splash' Ball Colegrave
66 S. 'Black Dragon' Ball Colegrave
67 S. [Versa Crimson Gold] = ‘Pas733805’ (Versa Series) Ball Colegrave
68 S. [Versa Green Halo] = 'Pas733809' (Versa Series) Ball Colegrave
69 S. 'Watermelon' Ball Colegrave
70 S. 'Lime Delight' Ball Colegrave
71 S. 'Lime Delight' Jaldety
72 S. [Colissima Amerena] Jaldety
73 S. [Colissima Capri] Jaldety
74 S. [Colissima Papaya] Jaldety
75 S. [Colissima Peach Melba] Jaldety
76 S. [Colissima Raspberry] Jaldety
77 S. [Colissima Strawberry] Jaldety
78 S. 'Alabama Sunset' Jaldety
79 S. 'Crimson Velvet' Jaldety
80 S. 'Display' Jaldety
81 S. 'Fireball' Jaldety
82 S. 'Glennis' Jaldety
83 S. 'Glory' Jaldety
84 S. 'Midnight' Jaldety
85 S. 'Mission Gem' Jaldety
86 S. 'Pineapple Beauty' AGM (H1c) 1994 Jaldety
87 S. 'Pineapplette' AGM (H1c) 1994 Jaldety
88 S. 'Pineapplette Red' Jaldety
89 S. 'Purple Oak' Jaldety
90 S. 'Red Velvet' Jaldety
91 S. 'Walter Turner' AGM (H1c) 1994 Jaldety
92 S. 'Carefree Mixed' Ball Colegrave
Final Report for Trial No. 1949 – Solenostemon 2013 9
Entries at Victoria Embankment Park
1 S. 'Madam Bauche' Kernock Park Plants
2 Extra Ball Colegrave Kernock Park Plants
3 S. ‘Juliet Quartermain’ AGM (H1c) 2013 Kernock Park Plants
4 S. 'Gay's Delight' AGM (H1c) 2013 Kernock Park Plants
5 S. 'Amarana' Kernock Park Plants
6 S. 'Combat' AGM (H1c) 2012 Kernock Park Plants
7 S. 'Peter's Wonder' Kernock Park Plants
8 S. 'Crimson Velvet' Kernock Park Plants
9 S. Colissima Peach Melba Kernock Park Plants
10 S. 'Scarlet Ribbon' Kernock Park Plants
11 S. 'Display' Kernock Park Plants
12 S. 'Walter Turner' AGM (H4) 1994 Kernock Park Plants
13 S. 'Gingernut' Kernock Park Plants
14 S. 'Midnight' Kernock Park Plants
15 S. 'Pineapple Beauty' AGM (H4) 1994 Kernock Park Plants
16 S. 'Colissima Raspberry' Kernock Park Plants
The Solenostemon Trial was assessed by members of the Solenostemon Trials Assessment Forum:
Chairman: Greg Redwood Members: Bill Boardman
David Creese Graham Rice Harriet Rycroft Ian Spence John Gibson Mike Smallwood Paul Atkinson Ray Waite
Source: Horticultural Trials and Relations, RHS Garden Wisley, Woking, Surrey GU23 6QB
E-mail: [email protected]
More information about RHS Trials and other colour illustrated reports can be found on the RHS Website: http://www.rhs.org.uk/trials
