Iris germanica Protocol - Bearded Iris
Iris germanica Protocol - Bearded Iris
Iris germanica Protocol
Bearded Iris
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Description
'Protocol' is an intermediate bearded iris with cheerful flowers in a bright harmony of cream white and lemon yellow. Its ruffled flowers display the classic amoena pattern: the petals are very pale and the sepals are richly coloured. This very vivid flowering, which occurs at the beginning of the bearded iris season, pairs well with blues, purples and silver foliage in borders.
With its flower stalks about 58 cm tall, 'Protocol' is classified among the Intermediate Bearded Iris, a group suited to adorning borders and the front of beds. These irises measure from 41 to 70 cm and form the transition between the earlier dwarf irises and the later tall bearded irises. They flower between late April and May, depending on the climate. In 'Protocol', the stems are quite short and carry several buds, which open one after another.
This iris belongs to the Iridaceae family. Iris germanica is a perennial with fleshy rhizomes that has given rise to thousands of cultivars that have been grown in gardens for a very long time. Its leaves are glaucous green, elongated, upright, pointed, arranged in a fan. They persist more or less in winter depending on the climate. The flowering of 'Protocol' occurs towards the beginning of the intermediate iris season. Its flowers are well ruffled and slightly crisped on the edges. The three upright petals are white, washed with lemon yellow in the centre. The three trailing sepals are a more intense yellow than dandelion yellow, slightly paler at the margin. The beards are white at the tip, chrome yellow in the middle and cadmium yellow in the throat. The fragrance is light. The clump grows slowly via its rhizomes which lengthen and multiply at the periphery.
'Protocol' is a Keith Keppel introduction, registered in 1994 and introduced in 1996. Its seedling number is 90-6M. It results from the cross-breeding between 'Over Easy' and 'Amber Snow'. This variety has received several American awards: Honorable Mention in 1998, Walther Cup in 1998, Award of Merit in 2000 and Hans and Jacob Sass Medal in 2002. The latter medal is reserved for Intermediate Bearded Iris.
This variety with its very spring-like colouring combines easily with bluish-purple, dark purple or pinkish white blooms. Along a path or in a raised border, you can associate it with the intermediate bearded iris 'Black Watch', which accentuates its yellow colouring by contrast. The Allium amplectens 'Graceful' accompanies its spring flowering with great lightness. The Salvia nemorosa 'Marcus' takes over with compact bluish-purple spikes. A few clumps of Armeria maritima 'Alba', placed at a distance from the rhizomes, can be planted at the front of the iris clumps.
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Flowering
Foliage
Plant habit
Botanical data
Iris
germanica
Protocol
Iridaceae
Bearded Iris
Cultivar or hybrid
Planting and care
Plant Iris ‘Protocol’ from July to October, when the rootstock can establish before winter, or in spring in heavy soils that remain damp in autumn. Choose a very sunny position, with at least six hours of direct sunlight a day. Prepare a light, crumbly, fairly rich soil, neutral to chalky or slightly acid, but above all well-draining. In clay soil, plant on a slight mound and mix gravel or coarse sand into the planting soil. Place the rootstock almost at the surface, with the back visible to the sun, then cover only the roots. Water after planting, and thereafter only during prolonged dry spells in the first year. Remove spent flowers as they fade. Cut back spent flower stems to the base, but keep healthy leaves until they turn yellow. Apply some well-rotted compost in spring around the clump, without covering the rootstocks. Divide the clumps every three or four years in summer when the centre produces fewer flowers.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.