Soil analysis
Soil analysis is recommended if you want to know the pH & nutrient content of your garden soil so that fertiliser applications can be optimised for the actual soil conditions.
If you cannot test your soil we have found that Inkarho rhododendron grow well in soils that support Magnolia and Japanese maples. Both of these are planted widely throughout the country and can be used as an easy guide to help you.
Remember your soil should be moist but free draining to obtain the best results from your rhododendron. We suggest that after planting you cover the soil with bark to help retain the moisture.
For soils with a pH higher than 7 we recommend that you apply sulphur or iron sulphate twice a year.
INKARHO plants grow vigorously and develop strong roots. They therefore need more nutrients than cutting-raised plants.
Fertiliser is recommended in the beginning of April to the beginning of May. A coated slow release fertiliser applied at this time is the best as this should be sufficient for the season
If the shrubs were only planted in April, you should wait 3 to 4 weeks before applying fertiliser because the plants need this period of time to develop new roots, and only then are they able to absorb adequate amounts of nutrients.
A second fertiliser application can be carried out before the end of July depending on the weather conditions.
Fertiliser recommendation Garden planting:
Coated long-term fertiliser. Apply as directed
Additional application of 60 to 80 g/m2 horn meal promotes flower bud growth.
Fertiliser recommendation Container plants:
Only with coated long-term fertiliser.
I
NKARHO Rhododendrons differ from cutting raised rhododendrons with their versatile roots. To highlight the brand they are always found in our burgundy pot faced with the Inkarho logo. We also attach to every plant a label carrying the INKARHO quality seal.
Only genuine with the INKARHO quality seal.
Planting times
INKARHO Rhododendrons cultivated in pots can be planted throughout the year – with the exception of periods of frosted ground. Take care to maintain a moist rootball when planting in dry spells.
INKARHO Rhododendrons are easy to look after. We recommend pinching out the wilted flowers when they have finished. This prevents unnecessary seed development and utilizes the nutrients for new growth and the formation of new flower buds for the following spring display.
As they grow older and larger, shrubs can also be pruned or cut into shape. The best time to do this is early spring before the shrubs begin to put out new shoots. Never replant a shrub in the same year or the year after it was pruned or cut into shape.
Inkarho rhododendrons are very versatile and perform well in most positions in the garden. Avoid scorching hot spots as this will quickly dry the soil and scorch the leaves. Dark shady areas will create large leaves, leggy growth and under perform in flowering.
| Species |
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| Rhododendron Hybriden |
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| Rhododendron ponticum |
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| Rhododendron yakushimanum |
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| Rhododendron INKARHO-Fragrant Hedge |
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| Enkianthus campanu-latus INKARHO |
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Full Sun Part Sun Light Shade
Winter hardiness is divided into four categories depending on the quality. The winter hardiness of the shrubs you have selected is given in the separate descriptions in the Varieties menu point.
| Value | Winter hardiness |
| Extremely Hardy | exceeds -24° C |
| Very Good | -21° to -24° C |
| Good | -18° to -21° C |
| Protect from cold | -15° to -18° C |
There is no need to worry if the leaves roll up strongly during frost. This is the plant’s own protection mechanism to avoid excessive evaporation.
Rhododendrons are very tough plants but do appreciate some shelter from cold easterly winds. Positioning correctly them in your garden will avoid winter damage
Guidebook
Cultural information