We usually recommend planting Dutch Iris bulbs 6” deep and 6” apart to allow for growth over time if they are being perennialized. Flower bulbs do everything in response to temperature and sunlight. We'll ship you the bulbs in time for planting in your garden in the fall, once the ground has chilled down to about 55☏, after about two weeks of sweater weather when night time temperatures have hovered in the 40s.
They also like a spot that tends to be warm and rather dry in the summer monthsĭutch Iris bulbs are so easy to plant and are low maintenance.
#Dutch iris full
What is good for vegetables is not necessarily good for flower bulbs.ĭutch Iris prefer full sunlight but can handle filtered sunlight or part-day sunlight.
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Partially decomposed compost can spread fungal disease, such as botrytis blight and nasty pests. If you would like to add compost you’ve made yourself, please make sure that it has a neutral pH and is completely decomposed and healthy. Please do not ever add horse manure, chicken droppings, mushroom compost or other hot manure or compost to your flower bulb beds. For excessively sandy soil, amend the bed with peat moss and aged leaf compost. For clay soil, break up the clay about a foot deeper than the planting depth of your bulbs and amend the bed with well-aged neutral-pH compost. Square footage is determined multiplying the planting site’s length by its width.Īll Dutch Iris require neutral pH and well-draining soil. You’ll need about nine bulbs per square foot. Never put flower bulbs in the freezer! Poor storage conditions could cause bulbs to dry out, or to become moldy. Store them in a cool, dry place with low humidity, away from heat, frost and strong sunlight at about 50☏ to 70☏. If any variety in any season produces a smaller top size bulb than expected, we note it on our website.Īfter you’ve received your order and inspected it, keep the exterior carton and the inner boxes open to give the bulbs some air. All of the larger bulbs are included in our stock, and, as a result, there can be size variation. Smaller bulbs fall through these holes and are not included in our stock. They are sized on conveyor belts in the Netherlands that have holes a hair under the 8 centimeter size.
#Dutch iris plus
If you find that one bag of Iris hollandica bulbs contains larger and smaller bulbs, it is because it contains 8 cm bulbs plus those larger than 8 cm. The top-size bulbs of Iris hollandica is 8 cm/up. Some bulbs are prettier than others, but you can rest assured that all of the flowers will be gorgeous! Some bulbs may already have tiny baby bulbs developing on the basal plate (root base) of the bulb while others may even have a little top shoot. As long as the bulb is firm, it is a good, viable bulb. The most important factor is the way that the bulb feels and smells.
#Dutch iris skin
The existence or condition of the skin has nothing to do with the performance of the bulb. Some bulbs may have a fully intact, papery skin while others have partial skins, and others may be skinless. Little cuts, scars, discolored exteriors and dimples are normal marks from the flower bulb harvesting, cleaning and sizing processes in the Netherlands. We make every effort to ship you only healthy, firm, top quality bulbs. Iris hollandica bulbs look a little like teardrops. Since every bag or box of bulbs in your order has been scanned using its UPC barcode, we can usually tell you in which box each variety is located. If there is a discrepancy, please call us immediately so that we may resolve it with you. If you can’t find something, open all of the inner boxes. Occasionally, bags of smaller bulbs may be placed in the inner boxes of other bulbs to reduce jostling during shipment.
In the spring, you can loosen the mulch in the area in which the Iris will be sprouting.Ĭheck your shipment against the packing slip and make sure that everything is as it should be. Good mulching mediums include straw, salt marsh hay or oak leaves. Mulch helps to protect the bulbs from arctic temperature spikes. The mulch should trap the cold temperatures into the soil, not warmth. If your garden is in a zone or micro-climate that is too cold or only marginally appropriate, you may want to apply no more than a 2" layer of mulch after the ground surface freezes in the fall. Iris hollandica is good for horticultural zones 5 through 8. These magnificent varieties are characterized by glorious ephemeral colors, larger flowers and often the growth of a second flowering stem. van Konijnenburg hybridized the award winning “Beauty” strain of Iris hollandica. In the 1940s, the De Graaf Brothers and S. If you are looking for heirloom Dutch Iris, you’ll be happy to know that some of our Iris hollandica varieties are moving into the heirloom range.
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