Thursday, April 12, 2012

Dahlias

Huntin' Wabbits
Much to my chagrin, the other Whipstone interns are dropping the ball on their blog posts.  In their defenses, Dylan has made two bro-friends in the form of the new interns: Andrew and Shane - nicknames to come - and Steph is constantly getting distracted by the adorable blond babies streaking through the house.  I can't blame either of them since Our Gal Freitag has an admirable confidence with children cough*willbegreatmother*cough and Kohlrabi King loves playing music and hunting rabbits with the boys.


In any case, it is up to Super Stix to Save Our Blog.  Let's begin with Dahlias!  As they lack seeds, these beauts are one high maintenance flower.  At the end of last season, Steph, Shanti and Piedad dug up tubers from the dahlias planted in the field and separated each one.
dividing.jpg
tuber: A swollen part of a stem or root, usually modified for storage (sugar, energy, etc.), and lasting for one year only, those of the succeeding year not arising from the old ones, nor bearing a position relative to them. Examples of such perennating organs are the stem tubers of potato (Solanum tuberosum) and the root tubers of Dahlia. Root tubers develop from adventitious roots and stem tuber may be distinguished from a root tuber by the presence of buds or 'eyes'.


Dahlia cuttings rooting in foam
Cuttings-to-be in together in their box
After they are washed, the tubers are individually wrapped and stored in the walk-in cooler until ready to be planted the next year.  At the end of February, Shanti took most of the tubers and planted them in large boxes in the greenhouse to grow cuttings.  The rest were put into their own flower pots to be sold at the farmer's markets later in the year as whole plants.  The process of taking cuttings is not so cut and dry (so to speak).  When the plants start to sprout out of the buds they are cut directly above the growth-origin.  To combat last year's problem of the cuttings not sprouting roots, we are experimenting with first putting them into foam cells that are specifically made to encourage rooting.  Once the roots begin popping out of the sides and bottom of the foam, they can be transplanted to regular plant trays - put on our heated tables and will hopefully continue to expand inside of these new cells.  We began this third step on Monday and will continue to fill the trays with each of our twenty or so different varieties until they are finally ready to be transplanted to the field, hopefully in early June.  Unfortunately, we will have to wait until August to start picking these floral eye candy.  For the moment, we are blessed to have tulips, daffodils and ranunculus to fill our bedrooms - oh and to sell, of course - so I am not complaining.
Each variety gets its own tray, no matter how many cuttings are rooted.  Different types do better than others for reasons unknown...
Back right: boxes of planted tubers
Back left: rooting cuttings
Front: in their trays and ready for transplant

2 comments:

  1. Dahlias do make seeds (I think) but are generally propagated by root division/cuttings. but other than that you were pretty right on.

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  2. Saying "I think" triggers some hidden unknown urge to Google......

    Propagating Dahlias

    Dahlias can he propagated vegetatively or from seed, depending on the type of dahlia.

    Propagation From Seed

    Planting dahlias from seed usually does not result in uniform flower forms, colors, and types, although dwarf bedding types such as the `Early Bird' or `Unwin' hybrids can he satisfactorily grown from seed. Seeds can be started indoors or sown directly in the garden. When starting dahlias from seed indoors, he sure to use a well-drained medium that is free from diseases and insects. Commercially available soil preparations containing peat and vermiculite are excellent. A soil-containing medium such as a mixture of one part sandy loam soil, one part shredded spaghnum peat moss, and one part sand is excellent, but such mediums must be pasteurized.

    Plant seeds about1/2inch deep in a pot, pack, or flat. Cover the seeds with more of the soil medium or pure vermiculite and add water until the soil is thoroughly moistened. Placing a film of polyethylene or a pane of glass over the container will keep the surface moist and enable the seeds to germinate undisturbed. Place the container in a warm location (not in direct sunlight) and allow seeds to germinate. Dahlias normally germinate in 5–7 days at temperatures between 70–80 degrees F. When the new shoots are first visible, remove the plastic or glass..."

    from Growing Dahlias, Paul E. Read, University of Minnesota Extension Service.

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