diff --git a/instat/dlgSeasonalGraph.Designer.vb b/instat/dlgSeasonalGraph.Designer.vb
new file mode 100644
index 00000000000..32effdb64af
--- /dev/null
+++ b/instat/dlgSeasonalGraph.Designer.vb
@@ -0,0 +1,41 @@
+<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
+Partial Class dlgSeasonalGraph
+    Inherits System.Windows.Forms.Form
+
+    'Form remplace la méthode Dispose pour nettoyer la liste des composants.
+    <System.Diagnostics.DebuggerNonUserCode()> _
+    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
+        Try
+            If disposing AndAlso components IsNot Nothing Then
+                components.Dispose()
+            End If
+        Finally
+            MyBase.Dispose(disposing)
+        End Try
+    End Sub
+
+    'Requise par le Concepteur Windows Form
+    Private components As System.ComponentModel.IContainer
+
+    'REMARQUE : la procédure suivante est requise par le Concepteur Windows Form
+    'Elle peut être modifiée à l'aide du Concepteur Windows Form.  
+    'Ne la modifiez pas à l'aide de l'éditeur de code.
+    <System.Diagnostics.DebuggerStepThrough()> _
+    Private Sub InitializeComponent()
+        Me.SuspendLayout()
+        '
+        'dlgSeasonalGraph
+        '
+        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
+        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
+        Me.ClientSize = New System.Drawing.Size(600, 450)
+        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedToolWindow
+        Me.MaximizeBox = False
+        Me.MinimizeBox = False
+        Me.Name = "dlgSeasonalGraph"
+        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
+        Me.Text = "Seasonal Graph"
+        Me.ResumeLayout(False)
+
+    End Sub
+End Class
diff --git a/instat/dlgSeasonalGraph.resx b/instat/dlgSeasonalGraph.resx
new file mode 100644
index 00000000000..1af7de150c9
--- /dev/null
+++ b/instat/dlgSeasonalGraph.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
diff --git a/instat/dlgSeasonalGraph.vb b/instat/dlgSeasonalGraph.vb
new file mode 100644
index 00000000000..57ef68e0d9f
--- /dev/null
+++ b/instat/dlgSeasonalGraph.vb
@@ -0,0 +1,3 @@
+Public Class dlgSeasonalGraph
+
+End Class
\ No newline at end of file
diff --git a/instat/frmMain.Designer.vb b/instat/frmMain.Designer.vb
index 55609bdfb37..d5dc9e36a17 100644
--- a/instat/frmMain.Designer.vb
+++ b/instat/frmMain.Designer.vb
@@ -261,10 +261,12 @@ Partial Class frmMain
         Me.mnuClimaticDescribeSummarise23Variables = New System.Windows.Forms.ToolStripMenuItem()
         Me.mnuClimaticDescribeGraph23Variables = New System.Windows.Forms.ToolStripMenuItem()
         Me.ToolStripSeparator31 = New System.Windows.Forms.ToolStripSeparator()
-        Me.ToolStripSeparator17 = New System.Windows.Forms.ToolStripSeparator()
         Me.mnuClimaticDescribeSPISPEI = New System.Windows.Forms.ToolStripMenuItem()
         Me.mnuClimaticDescribeClimograph = New System.Windows.Forms.ToolStripMenuItem()
+        Me.mnuClimaticDescribeTrendGraph = New System.Windows.Forms.ToolStripMenuItem()
+        Me.mnuClimaticDescribeSeasonalGraph = New System.Windows.Forms.ToolStripMenuItem()
         Me.mnuClimaticDescribeIDF = New System.Windows.Forms.ToolStripMenuItem()
+        Me.ToolStripSeparator17 = New System.Windows.Forms.ToolStripSeparator()
         Me.mnuClimaticDescribeWindRose = New System.Windows.Forms.ToolStripMenuItem()
         Me.mnuClimaticDescribeWindPollutionRose = New System.Windows.Forms.ToolStripMenuItem()
         Me.mnuClimaticDescribeOtherRosePlots = New System.Windows.Forms.ToolStripMenuItem()
@@ -278,7 +280,6 @@ Partial Class frmMain
         Me.mnuClimaticPICSA = New System.Windows.Forms.ToolStripMenuItem()
         Me.mnuClimaticPICSARainfallGraph = New System.Windows.Forms.ToolStripMenuItem()
         Me.mnuClimaticPICSATemperatureGraph = New System.Windows.Forms.ToolStripMenuItem()
-        Me.mnuClimaticPICSAGeneralGraph = New System.Windows.Forms.ToolStripMenuItem()
         Me.ToolStripSeparator73 = New System.Windows.Forms.ToolStripSeparator()
         Me.mnuClimaticPICSACumExeedenceGraph = New System.Windows.Forms.ToolStripMenuItem()
         Me.mnuClimaticPICSACrops = New System.Windows.Forms.ToolStripMenuItem()
@@ -2139,7 +2140,7 @@ Partial Class frmMain
         '
         'mnuClimaticDescribe
         '
-        Me.mnuClimaticDescribe.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuClimaticDescribeSummarise23Variables, Me.mnuClimaticDescribeGraph23Variables, Me.ToolStripSeparator31, Me.mnuClimaticDescribeSPISPEI, Me.mnuClimaticDescribeClimograph, Me.mnuClimaticDescribeIDF, Me.ToolStripSeparator17, Me.mnuClimaticDescribeWindRose, Me.mnuClimaticDescribeWindPollutionRose, Me.mnuClimaticDescribeOtherRosePlots})
+        Me.mnuClimaticDescribe.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuClimaticDescribeSummarise23Variables, Me.mnuClimaticDescribeGraph23Variables, Me.ToolStripSeparator31, Me.mnuClimaticDescribeSPISPEI, Me.mnuClimaticDescribeClimograph, Me.mnuClimaticDescribeTrendGraph, Me.mnuClimaticDescribeSeasonalGraph, Me.mnuClimaticDescribeIDF, Me.ToolStripSeparator17, Me.mnuClimaticDescribeWindRose, Me.mnuClimaticDescribeWindPollutionRose, Me.mnuClimaticDescribeOtherRosePlots})
         Me.mnuClimaticDescribe.Name = "mnuClimaticDescribe"
         Me.mnuClimaticDescribe.Size = New System.Drawing.Size(212, 22)
         Me.mnuClimaticDescribe.Text = "Describe"
@@ -2161,11 +2162,6 @@ Partial Class frmMain
         Me.ToolStripSeparator31.Name = "ToolStripSeparator31"
         Me.ToolStripSeparator31.Size = New System.Drawing.Size(208, 6)
         '
-        'ToolStripSeparator17
-        '
-        Me.ToolStripSeparator17.Name = "ToolStripSeparator17"
-        Me.ToolStripSeparator17.Size = New System.Drawing.Size(208, 6)
-        '
         'mnuClimaticDescribeSPISPEI
         '
         Me.mnuClimaticDescribeSPISPEI.Name = "mnuClimaticDescribeSPISPEI"
@@ -2179,6 +2175,19 @@ Partial Class frmMain
         Me.mnuClimaticDescribeClimograph.Size = New System.Drawing.Size(211, 22)
         Me.mnuClimaticDescribeClimograph.Text = "Climograph..."
         '
+        'mnuClimaticDescribeTrendGraph
+        '
+        Me.mnuClimaticDescribeTrendGraph.Name = "mnuClimaticDescribeTrendGraph"
+        Me.mnuClimaticDescribeTrendGraph.Size = New System.Drawing.Size(211, 22)
+        Me.mnuClimaticDescribeTrendGraph.Text = "Trend Graph..."
+        '
+        'mnuClimaticDescribeSeasonalGraph
+        '
+        Me.mnuClimaticDescribeSeasonalGraph.Enabled = False
+        Me.mnuClimaticDescribeSeasonalGraph.Name = "mnuClimaticDescribeSeasonalGraph"
+        Me.mnuClimaticDescribeSeasonalGraph.Size = New System.Drawing.Size(211, 22)
+        Me.mnuClimaticDescribeSeasonalGraph.Text = "Seasonal Graph..."
+        '
         'mnuClimaticDescribeIDF
         '
         Me.mnuClimaticDescribeIDF.Enabled = False
@@ -2186,6 +2195,11 @@ Partial Class frmMain
         Me.mnuClimaticDescribeIDF.Size = New System.Drawing.Size(211, 22)
         Me.mnuClimaticDescribeIDF.Text = "IDF..."
         '
+        'ToolStripSeparator17
+        '
+        Me.ToolStripSeparator17.Name = "ToolStripSeparator17"
+        Me.ToolStripSeparator17.Size = New System.Drawing.Size(208, 6)
+        '
         'mnuClimaticDescribeWindRose
         '
         Me.mnuClimaticDescribeWindRose.Name = "mnuClimaticDescribeWindRose"
@@ -2249,7 +2263,7 @@ Partial Class frmMain
         '
         'mnuClimaticPICSA
         '
-        Me.mnuClimaticPICSA.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuClimaticPICSARainfallGraph, Me.mnuClimaticPICSATemperatureGraph, Me.mnuClimaticPICSAGeneralGraph, Me.ToolStripSeparator73, Me.mnuClimaticPICSACumExeedenceGraph, Me.mnuClimaticPICSACrops})
+        Me.mnuClimaticPICSA.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuClimaticPICSARainfallGraph, Me.mnuClimaticPICSATemperatureGraph, Me.ToolStripSeparator73, Me.mnuClimaticPICSACumExeedenceGraph, Me.mnuClimaticPICSACrops})
         Me.mnuClimaticPICSA.Name = "mnuClimaticPICSA"
         Me.mnuClimaticPICSA.Size = New System.Drawing.Size(212, 22)
         Me.mnuClimaticPICSA.Text = "PICSA"
@@ -2266,12 +2280,6 @@ Partial Class frmMain
         Me.mnuClimaticPICSATemperatureGraph.Size = New System.Drawing.Size(246, 22)
         Me.mnuClimaticPICSATemperatureGraph.Text = "Temperature Graph..."
         '
-        'mnuClimaticPICSAGeneralGraph
-        '
-        Me.mnuClimaticPICSAGeneralGraph.Name = "mnuClimaticPICSAGeneralGraph"
-        Me.mnuClimaticPICSAGeneralGraph.Size = New System.Drawing.Size(246, 22)
-        Me.mnuClimaticPICSAGeneralGraph.Text = "General Graph..."
-        '
         'ToolStripSeparator73
         '
         Me.ToolStripSeparator73.Name = "ToolStripSeparator73"
@@ -5084,9 +5092,7 @@ Partial Class frmMain
         Me.IsMdiContainer = True
         Me.MainMenuStrip = Me.mnuBar
         Me.Name = "frmMain"
-        Me.Text = "R-Instat " + My.Application.Info.Version.Major.ToString + "." +
-                My.Application.Info.Version.Minor.ToString + "." +
-                My.Application.Info.Version.Build.ToString
+        Me.Text = "R-Instat .."
         Me.WindowState = System.Windows.Forms.FormWindowState.Maximized
         Me.stsStrip.ResumeLayout(False)
         Me.stsStrip.PerformLayout()
@@ -5698,8 +5704,6 @@ Partial Class frmMain
     Friend WithEvents mnuPrepareDataReshapeRandomSplit As ToolStripMenuItem
 
 
-
-    Friend WithEvents mnuClimaticPICSAGeneralGraph As ToolStripMenuItem
     Friend WithEvents ToolStripSeparator73 As ToolStripSeparator
     Friend WithEvents mnuOptionsByContextCropModel As ToolStripMenuItem
     Friend WithEvents mnuOptionsByContextCropModelApsimxExamples As ToolStripMenuItem
@@ -5766,4 +5770,6 @@ Partial Class frmMain
     Friend WithEvents mnuClimaticDescribeWindRose As ToolStripMenuItem
     Friend WithEvents mnuClimaticDescribeWindPollutionRose As ToolStripMenuItem
     Friend WithEvents mnuClimaticDescribeOtherRosePlots As ToolStripMenuItem
+    Friend WithEvents mnuClimaticDescribeTrendGraph As ToolStripMenuItem
+    Friend WithEvents mnuClimaticDescribeSeasonalGraph As ToolStripMenuItem
 End Class
diff --git a/instat/frmMain.vb b/instat/frmMain.vb
index d57cdd8e5c4..27eb531ec8a 100644
--- a/instat/frmMain.vb
+++ b/instat/frmMain.vb
@@ -2501,11 +2501,6 @@ Public Class frmMain
         dlgRandomSplit.ShowDialog()
     End Sub
 
-    Private Sub mnuClimaticPICSAGeneralGraph_Click(sender As Object, e As EventArgs) Handles mnuClimaticPICSAGeneralGraph.Click
-        dlgPICSARainfall.enumPICSAMode = dlgPICSARainfall.PICSAMode.General
-        dlgPICSARainfall.ShowDialog()
-    End Sub
-
     'Private Sub mnuOptionsByContextCropModel_Click(sender As Object, e As EventArgs) Handles mnuOptionsByContextCropModel.Click
     '    dlgApsimx.ShowDialog()
     'End Sub
@@ -2632,4 +2627,13 @@ Public Class frmMain
     Private Sub mnuClimaticDescribeOtherRosePlots_Click(sender As Object, e As EventArgs) Handles mnuClimaticDescribeOtherRosePlots.Click
         dlgOtherRosePlots.ShowDialog()
     End Sub
+
+    Private Sub mnuClimaticDescribeTrendGraph_Click(sender As Object, e As EventArgs) Handles mnuClimaticDescribeTrendGraph.Click
+        dlgPICSARainfall.enumPICSAMode = dlgPICSARainfall.PICSAMode.General
+        dlgPICSARainfall.ShowDialog()
+    End Sub
+
+    Private Sub mnuClimaticDescribeSeasonalGraph_Click(sender As Object, e As EventArgs) Handles mnuClimaticDescribeSeasonalGraph.Click
+        dlgSeasonalGraph.ShowDialog()
+    End Sub
 End Class
diff --git a/instat/instat.vbproj b/instat/instat.vbproj
index 4c289e05e77..a650e9eec1d 100644
--- a/instat/instat.vbproj
+++ b/instat/instat.vbproj
@@ -263,6 +263,12 @@
     <Compile Include="dlgRandomSplit.vb">
       <SubType>Form</SubType>
     </Compile>
+    <Compile Include="dlgSeasonalGraph.Designer.vb">
+      <DependentUpon>dlgSeasonalGraph.vb</DependentUpon>
+    </Compile>
+    <Compile Include="dlgSeasonalGraph.vb">
+      <SubType>Form</SubType>
+    </Compile>
     <Compile Include="dlgSurvey.Designer.vb">
       <DependentUpon>dlgSurvey.vb</DependentUpon>
     </Compile>
@@ -3071,6 +3077,9 @@
     <EmbeddedResource Include="dlgSearch.resx">
       <DependentUpon>dlgSearch.vb</DependentUpon>
     </EmbeddedResource>
+    <EmbeddedResource Include="dlgSeasonalGraph.resx">
+      <DependentUpon>dlgSeasonalGraph.vb</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="dlgSeasonalPlot.resx">
       <DependentUpon>dlgSeasonalPlot.vb</DependentUpon>
     </EmbeddedResource>