The Content Of The Article:
- winter possibilities
- Hibernation in the pot
- Hibernation in the field
- Dig out
- Prevent infections
- Cut roots
- plant out
Throughout the summer, the flowers of dahlia give pleasure to many hobby gardeners in their own garden. Dahlias are subtropical flowers that are native to Mexico and other Central American countries. The secret to successfully cultivating the plants with the showy flowers is underground: in the dahlia tubers. When the first frosts arrive, it's time to relocate. What you have to pay attention to, you will learn in this article.
HardinessDahlias, botanically Dahlia, are perennial, herbaceous plants that form tubers in the soil to survive. During the growing season, especially at the end of the flowering period, the dahlia stores various nutrients in these tubers in order to be able to drive out again in the spring. Since dahlias are used to warm temperatures, they are not sufficiently hardy for us. If you want a rich abundance of flowers again the following year, you should hibernate your plants properly.
winter possibilitiesSince the dahlia is not hardy, the underground tubers must be protected from frost. There are different possibilities for this:
- Excavate tubers and store in the basement
- Leave tubers in the pot
- Protect tubers from frost
Hibernation in the potIf you want to overwinter your dahlias in the plant pot, cut all shoots down to about 10 cm above ground level after the first frosts and dispose of the cut in the organic waste or on the compost. The pots are then placed in a cool, frost-free place where it should be dark. If the temperatures rise above 10 degrees, the Dahlia begins to drive out again. Keep the soil dry during the winter break to prevent mold and rot. So do not pour or spray.
Tip: Supply the tubers in the spring with fresh soil and a little fertilizer, then they can be made from the Eisheiligen back to the fresh air.
Hibernation in the fieldSome gardeners overwinter their plants in the field. However, there is a great danger that the tubers will not survive the cold temperatures.
- cut off dried shoots
- at 5 to 10 cm above ground level
- Thick layer of leaves or straw
- additionally cover with foil tunnel or bubble wrap
- the tubers should not get wet
- Complain slide with a few stones
- Remove the winter cover again in the spring
- from temperatures of 10 degrees
preparationTo prepare for hibernation, the perennials are only sparsely watered from the end of August. The reduction in moisture causes the dahlia to step up its efforts to store the reserves in the underground tubers. As the first night frosts set in, the foliage begins to wither and the aboveground plant parts die off.
Dig outIf you dug up the dahlias, the soil of the garden should be as dry as possible, because in this case the soil dissolves more easily from the roots and tubers. The best way to dig up the dahlias with a digger fork. So there is little danger of excessively injuring the tubers and roots. Before digging, the shoots are cut back about five to ten centimeters above the roots. At each of the storage organs must remain at least five inches long stem remnant, because from this so-called root neck drives the dahlia in the spring again from again. Carefully tap off adherent soil from the tuber.
LabelAn important detail that is often forgotten is to label the dahlia with a label of what variety and flower color it is.This step should be done immediately after digging up, because next spring you probably will not know which tuber belongs to which strain. This makes the flowerbed a colorful mess, because you can no longer distinguish the individual varieties.
CleanWash adhering debris from your dahlia tubers by panning them in a bowl or tub of room-warm water. Be very careful with this procedure, as even minor skin injuries can lead to the ingress of germs, causing the tubers to rot in their winter quarters.
Prevent infectionsBefore the dahlia tubers are stored, they should be subjected to a thorough inspection. Defective areas start to rot easily and ensure that the rot and mold pathogens spread further. Often damaged tubers can still be saved.
- Cut out foul spots generously with a sterile knife
- Remove dead parts
- Separate mother tuber
- This first-year tuber tends to rot
- Disinfect interfaces with charcoal powder
- alternatively use sulfur powder
- Sort out all damaged tubers and compost
- Only store healthy, strong dahlia tubers
divisionOlder, well-established dahlias form thick, numerous storage organs. Before storage, it is possible to divide the tubers to rejuvenate and replicate the plant. Ideally, each section has at least one eye. If you are not sure, you can wait until spring. As a rule, these eyes grow during the rest period, so that they are better recognizable in early spring.
Cut rootsThe small roots, which grow laterally from the tubers, have no other function. They usually die over the winter. Therefore, they can be cut off just before storage to avoid infection.
dryBefore tubers are stored, it is best to dry them for a few weeks in a warm, well-ventilated place. The tubers and roots are still wet when they are stored, the risk that they begin to rot. If the temperatures outside of this freezing point are still well outside and the weather is dry, the dahlia tubers can simply be dried on a newsprint outdoors. Important is a good air circulation, so that the storage organs can dry well. However, choose a location where the storage organs are not exposed to direct sunlight. The goal is to dry the tubers, not to cook them.
Tip: If you have the opportunity to hang the tubers individually in a net, this promotes drying. Hang the tubers upside down so that the residual moisture can drain out of the stems.
storeDahlia tubers should be stored dark and cool. Wooden boxes for wine or vegetables are best suited for this purpose. Dress the boxes inside with a few pages of newspaper and fill with a thin layer of dry sand, peat or sawdust. Put the dahlias in so they do not touch each other. Then fill in so much sand (peat, sawdust) that the tubers are completely covered. If the box is high enough, you can lay a second layer of dahlia tubers and cover them with substrate. An ideal place to camp is:
- Temperature: around 5 degrees
- cool cellar
- frost-free garage
- unheated utility room or hallway
- The humidity must not be too low
- best set up a bowl of water
- Ventilate the room regularly
lossesDespite perfect preparation and storage, it is possible for some dahlia bulbs to die or rot. This is normal and can not be prevented. With good preparation and control, the losses are limited. The stronger and healthier the tubers are, the greater the chance that they survive the winter unscathed. Weak, thin tubers arise when the following conditions are met:
- they are from very young plants
- The older the dahlia, the bigger the tubers become
- they could not grow for a whole summer
propellingIt can happen that the tubers of the Dahlia already drive out in their winter quarters again. That is no cause for concern. These shoots are simply shortened before planting in spring. If you want, you can also drive your dahlias in order to give them a head start. For those who take care of their dahlias in early spring will be rewarded with a particularly early and lush flowerage. Get the tubers from the winter quarters and make it easier for the plants to start the gardening season. All you need is a flowerpot and some substrate.
- Time: from March
- plant in a container filled with substrate
- Plant only one plant per pot
- Planting depth: 5 cm
- Location: bright window
- Temperature: 8 to 15 degrees (not too warm)
- just pour sparingly
- Time: from the end of April
- do not plant during prolonged rainy seasons
- the earth should only be slightly damp
- Planting depth: about 5 cm soil over the tuber
Since dahlias originally come from sun-drenched Mexico, they are unfortunately not sufficiently frost hardy. But their tubers can be overwintered easily and easily in any unheated cellar or in a frost-free garage. In cool and dry conditions there is a high chance that the dahlias survive the winter months unscathed.