considering a vineyard?
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Considering a Vineyard?
Dr. Paul DomotoDept. of Horticulturedomoto@iastate.edu
IOWA STATE UNIVERSITYUniversity Extension
Potential for a new enterprise:• Determine if your site is suitable for a vineyard.• Determine if there is a market for grapes in the area.
– Winery (private, cooperative, or build your own)– Other outlets: Farmer markets, grocery stores, hobbyist.
• Select cultivars to plant.- Adaptation to your specific conditions.- Use (wine, table, juice, jam & jellies) & demand.
• Plant the vines, establish trellis & begin training.– Financing
• Develop a good management program.– Time available – Cultural practices
IOWA STATE UNIVERSITYUniversity Extension
Is your site suitable for grapes?
• Drainage• Moisture Holding
Capacity• pH• Fertility• Organic Matter
• Elevation• Degree of
Slope• Direction of
Slope
• Nearness to a large body of water
• WinterTemperatures *
• Spring Frosts• Length of Growing
Season• Growing Degree
Days• Precipitation
SoilsTopographyClimate
* The most important climatic considerationIOWA STATE UNIVERSITYUniversity Extension
Winter TemperaturesDetermine what cultivars can be grown
& how productive they will be.
Cane buds are the most tender portion of a grape vine.
• A compound bud with the potential to produce 3 or more shoots.– 1o bud: The most productive. – 2o bud: Less productive; varies with type &
cultivar.• American types 50% or less productive• French hybrids 60-80% as productive.
– 3o bud: Very un-productive
1o
3o
2o
IOWA STATE UNIVERSITYUniversity Extension
Classification of Vine HardinessBased on the temperature at which injury begins to occur
Hardy labrusca, most riparia hybrids.Very hardy< - 20
Hardy French hybrids, most labrusca.HardyHardy- 15
Hardy vinifera, moderately hardy French hybrids.
ModeratelyModeratelyHardyHardy
- 10
Most northern vinifera.Cold tender- 5
Almost any.Very cold tender
> 0
Suitable TypeCategoryTemp. (Fo)
IOWA STATE UNIVERSITYUniversity Extension
4b
5a
USDA Hardiness Zone Map
IOWA STATE UNIVERSITYUniversity Extension
4a
3b
3a
Grape Cultivar AdaptationGrape Cultivar Adaptation
T?TY?TY?YTYYVery Hardy (-20)
NT?TT?TY?T?TYHardy (-15)
NNT?NT?TNT?TMod. Hardy (-10)
NNNNNT?NNT?Cold tender (-5)
4A4B5A4A4B5A4A4B5AClimatic Zone:
LateMidEarlyHarvest Season:
Y = Should be adapted.Y? = Testing may be requiredT = Testing is required
T? = Adaptability questionable,may not warrant testing.
N = Not adapted.
IOWA STATE UNIVERSITYUniversity Extension
Slope & ElevationSlope & Elevation
Frost Pocket
Under radiation freeze conditions
Cold air is heavierand settles into low areas.
IOWA STATE UNIVERSITYUniversity Extension Plant at least 50 ft above the valley floor.
Length of the Growing SeasonLength of the Growing Season
Excellent:Excellent: Most varieties.> 180
Good:Good: Early, mid-season & some late-season varieties.
170 to 180
Satisfactory:Satisfactory: Early & most mid-season maturing varieties.
160 to 170
Marginal:Marginal: Only early season maturing varieties.
150 to 160
UnacceptableUnacceptable< 150
Suitability for GrapesSuitability for GrapesFrostFrost--Free DaysFree Days
Is often very site specific.
IOWA STATE UNIVERSITYUniversity Extension
Frost Free Days
142173
147174
124147
143167
137160
115146
114148
102137
144167
108138
134155
129158
131154
137159
91120
@ 32o F, 50% probability@ 28o F, 50% probability
116148
130154
125145
129152
146175
166194
103154
ISU Armstrong R&D Farm Vineyard
Elevation:• Reduces the risk of spring & fall frosts.• Extends the growing season.• Protection from low winter temperatures.
IOWA STATE UNIVERSITYUniversity Extension
Length of the Growing Season
Elevation reduces the risk of spring & fall frosts.
• Cold air drainage.
Large bodies of water moderate the temperature.
• Delay warming up in the spring.
• Extend the growing season in the fall
Frost Free Days
142173
147174
124147
143167
137160
115146
114148
102137
144167
108138
134155
129158
131154
137159
91120
@ 32o F, 50% probability@ 28o F, 50% probability
116148
130154
125145
129152
146175
166194
103154
Growing Degree Days (Winkler)Growing Degree Days (Winkler)
High production, but table wine quality will be acceptable at best.3,501 to 4,000IV
High production of standard to good quality table wines.3,001 to 3,500III
Early and mid-season table varieties.2,501 to 3,000II
Early ripening varieties to achieve high quality.< 2,500I
Suggested Varieties Degree Days*Region
* Base 50o F; Degree day = ((daily high + low) / 2) – 50
IOWA STATE UNIVERSITYUniversity Extension
http://www.geobabble.org/~hnw/esri98/P33318.GIFIOWA STATE UNIVERSITYUniversity Extension
Precipitation
1-inch per week• Varies with:
a. Frequency of rain fallb. Rooting depth of the crop
• Grapes are deep rooted.
c. The soil’s moisture holding capacity.• Soil Texture• Soil depth
d. Temperature, relative humidity, & wind as they affect transpiration.
e. How the soil surface is maintained.
IOWA STATE UNIVERSITYUniversity Extension
http://www.ocs.orst.edu/pub/maps/Precipitation/Total/States/VT/vt.gif
IOWA STATE UNIVERSITYUniversity Extension
Degree of SlopeDegree of Slope
• Soil moisture– Infiltration– Surface runoff
• Air drainage of frost protection.• Soil erosion • Cultural practices
IOWA STATE UNIVERSITYUniversity Extension
0
5
10
15
20
25
30
35
40
45
0 20 40 60 80 100Feet
Ris
e pe
r 100
ft% Slope
30-40% (G)
20-30% (F)
14-20% (E)
9-14% (D)5-9% (C)2-5% (B)
0-2%
Soils with “B”, “C” and “D” slopes are best suited for grapes.IOWA STATE UNIVERSITYUniversity Extension
Direction of the Slope
Int. +Int. -HighestLowestRisk of Fluctuating Winter Temperatures
Int. +Int. -HighestLowestRisk of a Spring Frost
Int. +Int. -HighestLowestNeed for Water
Int. +Int. -HighestLowestAccumulation of Heat Units
Int. -Int. +HighestLowestAvailable Sunlight
WESNGrowing Condition
IOWA STATE UNIVERSITYUniversity Extension
If the length of the growing season is marginal for a cultivar, select a south facing slope.
Soil Selection Factors
• Internal Drainage• Moisture Holding Capacity
TextureDepth
• pH• Fertility
IOWA STATE UNIVERSITYUniversity Extension
County Soil Surveys•• Soil Series Description:Soil Series Description:
Texture, Drainage, Fertility, Erosion
•• Soil Profile Classification:Soil Profile Classification:Structure
•• Table of Engineering Index Properties:Table of Engineering Index Properties:Soil texture classification by depth
•• Table of Physical & Chemical Properties:Table of Physical & Chemical Properties:Permeability, Available water holding capacity, Organic matter content
IOWA STATE UNIVERSITYUniversity Extension
Soil Internal Drainage Soil Internal Drainage ClassificationClassification
AVOIDAVOID
AvoidAvoid
MarginalMarginalSuitableSuitable
IdealIdealMarginal Marginal
Very poorly drainedVery poorly drained
Poorly drainedPoorly drained
Somewhat poorly drainedSomewhat poorly drainedModerately wellModerately well--draineddrained
WellWell--draineddrainedExcessively drainedExcessively drained
Always best to dig test holes to check the drainage.
IOWA STATE UNIVERSITYUniversity Extension
Reasons for Poor Soil DrainageReasons for Poor Soil Drainage
• Poor surface runoffSlopeDepressions
• Lateral seepageOn slopesTextural change
• TextureHigh clay content
• Impervious layer in substrata
Clay layerCompacted layerAbrupt textural
change
• High water table
IOWA STATE UNIVERSITYUniversity Extension
Dig Soil Test HolesDig Soil Test Holes
Test Holes:• 3 feet deep• Fill with water• Check after 72 hrs• If water is still
present:- Find another site- Take corrective
measuresIOWA STATE UNIVERSITYUniversity Extension
Dr. Bruce Bordelon, Purdue University
What Can be DoneWhat Can be Doneto Improve Soil Drainageto Improve Soil Drainage
• Sub-soil before planting- Effective for compacted soils if there is good soil
below.• Plant on raised beds
- Suitable on moderately well drained soils.- Maybe okay for somewhat poorly drained soils.
• Install drainage tile- Suitable for somewhat poorly drained soils.- Maybe okay of poorly drained soils (distance
between tile lines & cost become a factor).IOWA STATE UNIVERSITYUniversity Extension
Clay
SiltyClay
Silty ClayLoam
Clay Loam
SandyClay
SandyClay Loam
LoamSilt LoamSandy
Loam SiltSandLoamy
Sand
Moisture Holding Capacity
0.51.01.52.02.52.52.0
SandLoamy sandSandy loamLoamSilt loamClay loamClay
Inches Inches Per footPer footTextureTexture
Soil Texture + Soil DepthAvailable Moisture
IOWA STATE UNIVERSITYUniversity Extension
http://www.geobabble.org/~hnw/esri98/P33308.GIF
IOWA STATE UNIVERSITYUniversity Extension
Soil pH for Grapes• Desired range: 5.5 to 6.5
- American: 5.0 to 6.5 (~ 6.0 optimum)- French Hybrid: 5.5 to 6.5; (6.0 to 6.5 optimum)
• Will tolerate a pH up to ~ 7.0
• Adjust Soil pH:- Below 6.0: bring up to 6.0 or 6.5 with lime.- Above 6.8 or 7.0: consider lowering to 6.5 or 6.0
with sulfur, or using acid forming fertilizers(ammonium sulfate).
IOWA STATE UNIVERSITYUniversity Extension
0
2
4
6
8
10
12
14
16
18
20
6.95 6.8 6.7 6.6 6.5 6.4 6.3 6.2 6.1 6 5.9 5.8 5.7 5.6 5.5 5.4 5.3 5.2 5.1 5 4.9 4.8
Buffer pH
To
ns
of
Lim
esto
ne
/ Acr
e
pH 6.5
pH 6.0
Lime RequirementLime Requirementto Raise the Soil pH to 6.5 and 6.0to Raise the Soil pH to 6.5 and 6.0
IOWA STATE UNIVERSITYUniversity Extension
0
500
1000
1500
2000
2500
3000
3500
6.5 7 7.5 8 8.5
Soil pH
Lbs
per
Acr
e
Sand
Loam
Clay
Sulfur RequirementSulfur Requirementto Reduce the Soil pH to 6.5to Reduce the Soil pH to 6.5
?
Lbs sulfur required to adjust the top 8 inches of soil.IOWA STATE UNIVERSITYUniversity Extension
Soil pH Soil pH Nutrient Availability as Influenced by Soil pHNutrient Availability as Influenced by Soil pH
Nitrogen (N)
Phosphorous (P)
Potassium (K)
Calcium (Ca)
Magnesium (Mg)
Sulfur (S)
Iron (Fe)
Manganese (Mn)
Boron (B)
Copper (Cu)
Zinc (Zn)
Molybdenum (Mo)
4 5 6 7 8 9 105.5 6.5
IOWA STATE UNIVERSITYUniversity Extension
Iron Iron ChlorosisChlorosis
Photographed by Eli Bergmeier
Soil pH 8.0
IOWA STATE UNIVERSITYUniversity Extension
Soil FertilitySoil Fertility• Least concern when selecting a site.
– Can amend the soil.• Concerns:
– P Immobile in the soil. • Pre-plant application is the only economical chance to correct a
shortage.• Often high where manure has been applied.
– K Grapes have a high requirement for K.• Can stratify where cultivation is not practiced as in a vineyard.• Excessive soil Mg can inhibit the uptake of K.
– Mg Can be low in many eastern soils, particularly on sandier soils.
• Uptake of Mg can be inhibited where K has been over-applied.
– Zn Grapes have a relatively high requirement for Zn.
IOWA STATE UNIVERSITYUniversity Extension
PrePre--plant Soil Testplant Soil Test
• Test for: pH, P, K, Zn, Mg, O.M.• Submit serial samples collected from 2
depths:0 to 6 or 0 to 8 inch depth.6 to 12 or 8 to 16 inch depth.
IOWA STATE UNIVERSITYUniversity Extension
Desirable Soil Test Ranges for GrapesDesirable Soil Test Ranges for Grapes
üüüüüüüüüüüü
U of VTU of VT6.0 to 7.0
- -> 25 ppm
> 150 ppm> 600 ppm~ 100 ppm
> 1 ppm> 1 ppm> 6 ppm
> 0.2 ppm
U of MNU of MN6.0 to 6.5
2 to 3 (4) %> 30 ppm
> 150 ppm- -
100 to 125 ppm- -
4 to 5 ppm- -- -
5.5 to 6.52 to 3 %
20 to 50 ppm125 to 150 ppm
- -100 to 125 ppm.75 to 1.0 ppm
4 to 5 ppm- -- -
pHOrganic matterPhosphorous (P)Potassium (K)Calcium (Ca)Magnesium (Mg)Boron (B)Zinc (Zn)Manganese (Mn)Copper (Cu)Iron (Fe)Sulfur (S)
ISUISUBulBul. 861*. 861*TestTest
* Midwest Small Fruit Pest Management Handbook
IOWA STATE UNIVERSITYUniversity Extension
Soil Organic MatterSoil Organic Matter• Improves soil structure, moisture retention and
fertility.–– 2 to 3% is considered ideal for grapes2 to 3% is considered ideal for grapes..
• Midwest Soils:– Range from < 1% up to 20% – Well-drained soils in the 3 to 4% range – OM is higher in poorer drained soils.
• Vermont soils vary:– Higher in the Champlain Valley.– Low in the river valleys.
• Grapes grown on high organic soils tend to be less winter hardy.
Release of N from organic matter.20 lb N / % OM / Ac / Yr
IOWA STATE UNIVERSITYUniversity Extension
Nitrogen Released from Organic Matter
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7 8 9 10% Soil Organic Matter
Lbs
Act
ual N
per
Acr
e
? ?X
IOWA STATE UNIVERSITYUniversity Extension
IOWA STATE UNIVERSITYUniversity Extension
http://www.geobabble.org/~hnw/esri98/P33310.GIF
Vermont Soils
Champlain Valley• Silty to clayey soils.• Most are naturally acid &
liming has been done.– Band of calcareous soils
near the lake w/ a naturally high pH.
• High CEC.• High in K.• Some relatively high Mg. • Low in P• B can be low
River Valleys• Sandy to loamy soils• They are naturally acid &
liming has been done.• Low CEC.• Low in Mg.• High in P.
– Naturally high– From manure
• B can be low
IOWA STATE UNIVERSITYUniversity Extension
PrePre--plant Soil Testplant Soil Test
• Test for: pH, P, K, Mg, Zn, O.M. (B)• Separate sample for each soil type.• Separate samples for different cropping
histories.• Submit samples collected from 2
depths:– 0 to 6 inch, or 0 to 8 inch depth.– 6 to 12 inch, or 8 or 16 inch depth.
• Have your Extension specialist look over the results.
IOWA STATE UNIVERSITYUniversity Extension
Cost of Establishing a Vineyard
IOWA STATE UNIVERSITYUniversity Extension
Iowa State University
Dept. of Horticulture
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Winery and Vineyard Feasibility Workbooks
Created September 2005Created September 2005
The Cost to Establish a Vineyard workbook is designed to report all the income and expense of a one-acre vineyard for up to 13 years. There are three different vineyard workbooks, each for a different trellis style.• High Trellis • Geneva Double Curtain • Vertical Shoot Position
• Winery Ten Year Financial Planning Workbook (version 5)•Errors in the asset worksheet of version 1 were found in Column J that may affect the total investment. If you are using version 1 please check the numbers in cell J35, J49, and J185. Also check to see if the numbers add up correctly on line 181.
• Estimated Vineyard Establishment with a High Trellis and Production Cost Per Acre• Estimated Vineyard Establishment with a Geneva double Curtain and Production Cost Per Acre• Estimated Vineyard Establishment with a Vertical Shoot Position and Production Cost Per Acre
IOWA STATE UNIVERSITYUniversity Extension
Factors Affecting the Cost of Vineyard Factors Affecting the Cost of Vineyard EstablishmentEstablishment
• Vine spacing (number per acre)
• Cost of the vines• Method of planting
– By hand, w/ an auger, or planting machine
• Length of the rows• Line post spacing (post per acre)
• Method used to install the line post– Post driver, or post hole auger
• End post design (Anchored vs H-Brace)
• Number of wires per row (training system)
IOWA STATE UNIVERSITYUniversity Extension
Vine Cost per Acre
$0.00
$500.00
$1,000.00
$1,500.00
$2,000.00
$2,500.00
$3,000.00
$3,500.00
$1.00 $1.50 $2.00 $2.50 $3.00 $3.50 $4.00
Cost per Vine
Cos
t pe
r A
cre
6 x 9 ft
7 x 9 ft8 x 9 ft
6 x 10 ft7 x 10 ft
8 x 10 ft6 x 12 ft
7 x 12 ft8 x 12 ft
IOWA STATE UNIVERSITYUniversity Extension
Cost of Trellis Materials per AcreCost of Trellis Materials per Acre
$1,000
$1,500
$2,000
$2,500
$3,000
$3,500
$4,000
$4,500
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Line Post per Row
Dol
lars
per
Acr
e
9 ft, Post @ 21 ft
9 ft, Post @ 24 ft
9 ft, Post @ 28 ft
10 ft, Post @ 21 ft
10 ft, Post @ 24 ft
10 ft, Post @ 28 ft
IOWA STATE UNIVERSITYUniversity Extension
Trellis SystemsSingle Curtain Bi-lateral Cordon
(Hi-Trellis)
6-cane Kniffen Geneva Double Curtain
Catch Wire System(VSP)
2 wires
3 wires 3 - 4 wires
7 wires
IOWA STATE UNIVERSITYUniversity Extension
Cost of Trellis MaterialCost of Trellis Materialby Training System*by Training System*
1000
1500
2000
2500
3000
3500
4000
4500
5000
3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Line Posts per Row
Dol
lars
per
Acr
e
Hi-Trellis @ 10 ft
VSP @ 10 ft
GDC @ 12 ft
* With H-brace end post systemIOWA STATE UNIVERSITYUniversity Extension
Vineyard Establishment WorkbooksVineyard Establishment WorkbooksAssumptionsAssumptions
• Vines @ $ 1.75 (Maréchal Foch )• 8 x 10 ft spacing (545 vines/A)• Trained to a hi-trellis (single curtain cordon)• Plant by machine• H-Brace w/ short end post• Labor @ $8.69 ($8.00/hr + FICA)• Financed @ 6% interest• Production @ $1,000 per ton
– Year 3 1.5 tons– Year 4 3.0 tons– Year 5 + 3.5 tons
IOWA STATE UNIVERSITYUniversity Extension
HiHi--Trellis Establishment BudgetTrellis Establishment BudgetMaréchal Foch
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
0 1 2 3 4 5 6 7 8 9 10 11 12Year
Do
llars
per
Acr
e
Ann Exp
Ann Inc
Acum Exp
Acum Profit
IOWA STATE UNIVERSITYUniversity Extension
Vineyard Establishment WorkbooksVineyard Establishment WorkbooksAssumptionsAssumptions
• Vines @ $ 2.50 (Frontenac)• 8 x 10 ft spacing (545 vines/A)• Trained to a hi-trellis (single curtain cordon)• Plant by machine• H-Brace w/ short end post• Labor @ $8.69 ($8.00/hr + FICA)• Financed @ 6% interest• Production @ $1,000 per ton
– Year 3 2.0 tons– Year 4 4.0 tons– Year 5 + 5.0 tons
IOWA STATE UNIVERSITYUniversity Extension
HiHi--Trellis Establishment BudgetTrellis Establishment BudgetFrontenacFrontenac
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
0 1 2 3 4 5 6 7 8 9 10
Year
Do
llars
per
Acr
e
Ann ExpAnn IncAcum ExpAcum Profit
IOWA STATE UNIVERSITYUniversity Extension
IOWA STATE UNIVERSITYUniversity Extension
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