diff --git a/src/build_models/auxingrowthplugin.h b/src/build_models/auxingrowthplugin.h
new file mode 100644
--- /dev/null
+++ b/src/build_models/auxingrowthplugin.h
@@ -0,0 +1,63 @@
+/*
+ *  $Id$
+ *
+ *  This file is part of the Virtual Leaf.
+ *
+ *  The Virtual Leaf is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  The Virtual Leaf is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with the Virtual Leaf.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *  Copyright 2010 Roeland Merks.
+ *
+ */
+
+#ifndef _AUXINGROWTHPLUGIN_H_
+#define _AUXINGROWTHPLUGIN_H_
+
+#include <QObject>
+#include <QtGui>
+#include <QString>
+#include "../simplugin.h"
+
+
+class AuxinGrowthPlugin : public QObject, SimPluginInterface {
+	Q_OBJECT
+	Q_INTERFACES(SimPluginInterface);
+
+public:
+	virtual QString ModelID(void) { return QString( "Auxin accumulation and growth" ); }
+	
+	// Executed after the cellular mechanics steps have equillibrized
+	virtual void CellHouseKeeping (CellBase &c);
+	// Differential equations describing transport of chemicals from cell to cell
+	virtual void CelltoCellTransport(Wall *w, double *dchem_c1, double *dchem_c2);
+    
+	// Differential equations describing chemical reactions taking place at or near the cell walls
+	// (e.g. PIN accumulation)
+	virtual void WallDynamics(Wall *w, double *dw1, double *dw2);
+	
+	// Differential equations describing chemical reactions inside the cells
+	virtual void CellDynamics(CellBase *c, double *dchem);
+	
+	// to be executed after a cell division
+	virtual void OnDivide(ParentInfo &parent_info, CellBase &daughter1, CellBase &daughter2);
+	
+	// to be executed for coloring a cell
+	virtual void SetCellColor(CellBase &c, QColor &color);	
+	// return number of chemicals
+	virtual int NChem(void) { return 2; }
+	
+private:
+	double complex_PijAj(CellBase &here, CellBase &nb, Wall &w);
+};
+
+#endif