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Getting Good Growth of Young Trees

Posted by John Knisley 
Getting Good Growth of Young Trees
February 22, 2015 10:19PM
Hello, I have been grafting for about three years now and have had a decent take from the trees I have grafted, with some trees now 3 years old. Where I am having trouble is getting the trees to grow a little taller or faster, they just seem to remain small. I understand you must be very careful with any amendments just after putting out newly grafted trees, but can I get some advice on when we should start adding organic amendments to the young trees? What organic amendments are recommended? What should I be putting in the hole with the newly grafted tree?

Thank you!!
Re: Getting Good Growth of Young Trees
February 23, 2015 11:31AM
Young grafts should be treated closer to vegetable starts than to trees. The mention of the word "hole" leads me to believe they are being set out somewhere other than a true nursery bed. Although the tree will require different environmental and nutritional needs than an annual, they do need the same sort of babysitting. Consider water and warmth as the "fertilizers" of first importance. This latter point is all to often left out of the equation. This also means keeping the humidity up, especially if the union is not healed so well. (Drying out the scion may not simply kill it, it may be just crummy growth). Also, make sure it is the growing conditions and not the grafting procedure that is causing slow growth. This especially means aftercare for proper heal. When they are growing, give them the attention you would give to your little tomatoes, including mulching and weeding.

There will be a disconnect in how the baby is treated in this first year or two, and how it will receive nutrition as an adult. Later in life in a healthy system, it will do well with gradual release through organic matter, in conjunction with good mycorrhizal fungal connections. Now, in a bed that has been prepared with forethought (fungal connections partially in place) and living soil, good growth is possible. Even in this situation, some supplementation is helpful. A foliar application is great, but a sustainably derived fertilizer in that bed is a good idea as well. They benefit from a bit of nitrogen which, being easily available in a mineralized form is an easy one, as is K. But, P and other micronutrients really should have been developed in that living soil. It is when the quick fix is needed that growers turn to industrial farming methods like triple superphosphate, miracle grow and 20 20 20 .

Having done this a bit commercially, I find that that first year never really is all that spectacular for growth, whether that is seedling plants or grafted fruit trees. I think they are pissed from being moved around and violated, and they need to be at peace again. That second year is always awesome, for most. But, if the soil is a mess and it is too late to fix it, foliar sprays, watering on time, and keeping things in the low 70's will give the best growth rates.

If the little guys are stunted in that first year or two, it will take a few more to get things back on track, in my experience. That said, a small tree is not always a poor tree. (Charlie Brown knew this) As long as it is healthy, slower can also mean denser and more resilient wood. I would put our smaller gritty trees up against the overly succulent fertilizer pushed trees any day of the week.

Walden Heights Nursery & Orchard
Zone 3 in Vermont
Re: Getting Good Growth of Young Trees
February 23, 2015 02:25PM
Great insight Todd, thank you. To answer a couple of questions: Yes we do have the trees in a nursery bed, basically a tilled garden bed and have straw mulch to keep the soil from drying out too quickly and to keep away as much of the grass/weed competition as we can. It is drip-irrigated. We have NOT been using a mycorrhizal root dip prior to planting, but after M.P.'s presentation in Iowa over the weekend I am convinced it would help in my situation. We do not use any fertilizers at all on our young trees but use Neptunes Fish Fertilizer a lot on the farm and should maybe spray the soil around the young trees as well as the foliage on them. We have very black loam soil here at our place, but it had been farmed conventionally for many years, so its more bacterial than fungal in nature (for now).

John
Alternative Roots Farm
Zone 4b in Minnesota
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