diff --git a/python/core/auto_generated/mesh/qgsmeshrenderersettings.sip.in b/python/core/auto_generated/mesh/qgsmeshrenderersettings.sip.in
index becf8effe51..36390ce5588 100644
--- a/python/core/auto_generated/mesh/qgsmeshrenderersettings.sip.in
+++ b/python/core/auto_generated/mesh/qgsmeshrenderersettings.sip.in
@@ -90,6 +90,19 @@ Returns color ramp shader function
     void setColorRampShader( const QgsColorRampShader &shader );
 %Docstring
 Sets color ramp shader function
+%End
+
+    double classificationMin() const;
+%Docstring
+Returns min value used for creation of the color ramp shader
+%End
+    double classificationMax() const;
+%Docstring
+Returns max value used for creation of the color ramp shader
+%End
+    void setClassificationMinMax( double vMin, double vMax );
+%Docstring
+Sets min/max values used for creation of the color ramp shader
 %End
 
     QDomElement writeXml( QDomDocument &doc ) const;
diff --git a/src/app/mesh/qgsmeshrendererscalarsettingswidget.cpp b/src/app/mesh/qgsmeshrendererscalarsettingswidget.cpp
index 9cf26c30ac2..1e919707466 100644
--- a/src/app/mesh/qgsmeshrendererscalarsettingswidget.cpp
+++ b/src/app/mesh/qgsmeshrendererscalarsettingswidget.cpp
@@ -45,6 +45,7 @@ QgsMeshRendererScalarSettings QgsMeshRendererScalarSettingsWidget::settings() co
 {
   QgsMeshRendererScalarSettings settings;
   settings.setColorRampShader( mScalarColorRampShaderWidget->shader() );
+  settings.setClassificationMinMax( lineEditValue( mScalarMinLineEdit ), lineEditValue( mScalarMaxLineEdit ) );
   return settings;
 }
 
@@ -59,8 +60,8 @@ void QgsMeshRendererScalarSettingsWidget::syncToLayer( )
   const QgsMeshRendererSettings rendererSettings = mMeshLayer->rendererSettings();
   const QgsMeshRendererScalarSettings settings = rendererSettings.scalarSettings( mActiveDatasetGroup );
   const QgsColorRampShader shader = settings.colorRampShader();
-  whileBlocking( mScalarMinLineEdit )->setText( QString::number( shader.minimumValue() ) );
-  whileBlocking( mScalarMaxLineEdit )->setText( QString::number( shader.maximumValue() ) );
+  whileBlocking( mScalarMinLineEdit )->setText( QString::number( settings.classificationMin() ) );
+  whileBlocking( mScalarMaxLineEdit )->setText( QString::number( settings.classificationMax() ) );
   whileBlocking( mScalarColorRampShaderWidget )->setFromShader( shader );
 }
 
diff --git a/src/core/mesh/qgsmeshlayer.cpp b/src/core/mesh/qgsmeshlayer.cpp
index 5b39188ef6c..d0101f93e42 100644
--- a/src/core/mesh/qgsmeshlayer.cpp
+++ b/src/core/mesh/qgsmeshlayer.cpp
@@ -216,6 +216,7 @@ void QgsMeshLayer::assignDefaultStyleToDatasetGroup( int groupIndex )
   fcn.classifyColorRamp( 5, -1, QgsRectangle(), nullptr );
 
   QgsMeshRendererScalarSettings scalarSettings;
+  scalarSettings.setClassificationMinMax( groupMin, groupMax );
   scalarSettings.setColorRampShader( fcn );
   mRendererSettings.setScalarSettings( groupIndex, scalarSettings );
 }
diff --git a/src/core/mesh/qgsmeshlayerrenderer.cpp b/src/core/mesh/qgsmeshlayerrenderer.cpp
index 966d75a78c4..5dd402a6710 100644
--- a/src/core/mesh/qgsmeshlayerrenderer.cpp
+++ b/src/core/mesh/qgsmeshlayerrenderer.cpp
@@ -205,13 +205,14 @@ void QgsMeshLayerRenderer::renderScalarDataset()
   if ( !index.isValid() )
     return; // no shader
 
-  QgsColorRampShader *fcn = new QgsColorRampShader( mRendererSettings.scalarSettings( index.group() ).colorRampShader() );
+  const QgsMeshRendererScalarSettings scalarSettings = mRendererSettings.scalarSettings( index.group() );
+  QgsColorRampShader *fcn = new QgsColorRampShader( scalarSettings.colorRampShader() );
   QgsRasterShader *sh = new QgsRasterShader();
   sh->setRasterShaderFunction( fcn );  // takes ownership of fcn
   QgsMeshLayerInterpolator interpolator( mTriangularMesh, mScalarDatasetValues, mScalarDataOnVertices, mContext, mOutputSize );
   QgsSingleBandPseudoColorRenderer renderer( &interpolator, 0, sh );  // takes ownership of sh
-  renderer.setClassificationMin( fcn->minimumValue() );
-  renderer.setClassificationMax( fcn->maximumValue() );
+  renderer.setClassificationMin( scalarSettings.classificationMin() );
+  renderer.setClassificationMax( scalarSettings.classificationMax() );
 
   std::unique_ptr<QgsRasterBlock> bl( renderer.block( 0, mContext.extent(), mOutputSize.width(), mOutputSize.height(), mFeedback.get() ) );
   QImage img = bl->image();
diff --git a/src/core/mesh/qgsmeshrenderersettings.cpp b/src/core/mesh/qgsmeshrenderersettings.cpp
index 59a7622344e..95c7a70e1d5 100644
--- a/src/core/mesh/qgsmeshrenderersettings.cpp
+++ b/src/core/mesh/qgsmeshrenderersettings.cpp
@@ -78,9 +78,17 @@ void QgsMeshRendererScalarSettings::setColorRampShader( const QgsColorRampShader
   mColorRampShader = shader;
 }
 
+void QgsMeshRendererScalarSettings::setClassificationMinMax( double vMin, double vMax )
+{
+  mClassificationMin = vMin;
+  mClassificationMax = vMax;
+}
+
 QDomElement QgsMeshRendererScalarSettings::writeXml( QDomDocument &doc ) const
 {
   QDomElement elem = doc.createElement( "scalar-settings" );
+  elem.setAttribute( "min-val", mClassificationMin );
+  elem.setAttribute( "max-val", mClassificationMax );
   QDomElement elemShader = mColorRampShader.writeXml( doc );
   elem.appendChild( elemShader );
   return elem;
@@ -88,6 +96,8 @@ QDomElement QgsMeshRendererScalarSettings::writeXml( QDomDocument &doc ) const
 
 void QgsMeshRendererScalarSettings::readXml( const QDomElement &elem )
 {
+  mClassificationMin = elem.attribute( "min-val" ).toDouble();
+  mClassificationMax = elem.attribute( "max-val" ).toDouble();
   QDomElement elemShader = elem.firstChildElement( QStringLiteral( "colorrampshader" ) );
   mColorRampShader.readXml( elemShader );
 }
diff --git a/src/core/mesh/qgsmeshrenderersettings.h b/src/core/mesh/qgsmeshrenderersettings.h
index 31387a65326..e17b700af02 100644
--- a/src/core/mesh/qgsmeshrenderersettings.h
+++ b/src/core/mesh/qgsmeshrenderersettings.h
@@ -82,6 +82,13 @@ class CORE_EXPORT QgsMeshRendererScalarSettings
     //! Sets color ramp shader function
     void setColorRampShader( const QgsColorRampShader &shader );
 
+    //! Returns min value used for creation of the color ramp shader
+    double classificationMin() const { return mClassificationMin; }
+    //! Returns max value used for creation of the color ramp shader
+    double classificationMax() const { return mClassificationMax; }
+    //! Sets min/max values used for creation of the color ramp shader
+    void setClassificationMinMax( double vMin, double vMax );
+
     //! Writes configuration to a new DOM element
     QDomElement writeXml( QDomDocument &doc ) const;
     //! Reads configuration from the given DOM element
@@ -89,6 +96,8 @@ class CORE_EXPORT QgsMeshRendererScalarSettings
 
   private:
     QgsColorRampShader mColorRampShader;
+    double mClassificationMin = 0;
+    double mClassificationMax = 0;
 };
 
 /**
diff --git a/src/ui/mesh/qgsmeshrendererscalarsettingswidgetbase.ui b/src/ui/mesh/qgsmeshrendererscalarsettingswidgetbase.ui
index 97c01cf2e9d..05832480ae6 100644
--- a/src/ui/mesh/qgsmeshrendererscalarsettingswidgetbase.ui
+++ b/src/ui/mesh/qgsmeshrendererscalarsettingswidgetbase.ui
@@ -47,7 +47,7 @@
      <item>
       <widget class="QPushButton" name="mScalarRecalculateMinMaxButton">
        <property name="text">
-        <string>Recalculate</string>
+        <string>Load</string>
        </property>
       </widget>
      </item>