diff --git a/backend/src/utils/validation.js b/backend/src/utils/validation.js
index 7a5692e..3a3e456 100644
--- a/backend/src/utils/validation.js
+++ b/backend/src/utils/validation.js
@@ -95,10 +95,10 @@ const applicationPlanSchema = Joi.object({
   lawnSectionId: Joi.number().integer().positive().required(),
   equipmentId: Joi.number().integer().positive().required(),
   plannedDate: Joi.date().required(),
-  notes: Joi.string(),
+  notes: Joi.string().allow('').optional(),
   products: Joi.array().items(Joi.object({
-    productId: Joi.number().integer().positive(),
-    userProductId: Joi.number().integer().positive(),
+    productId: Joi.number().integer().positive().optional(),
+    userProductId: Joi.number().integer().positive().optional(),
     rateAmount: Joi.number().positive().required(),
     rateUnit: Joi.string().max(50).required()
   })).min(1).required()
diff --git a/frontend/src/components/Maps/PropertyMap.js b/frontend/src/components/Maps/PropertyMap.js
index a2f53b5..4c6e2b6 100644
--- a/frontend/src/components/Maps/PropertyMap.js
+++ b/frontend/src/components/Maps/PropertyMap.js
@@ -355,9 +355,27 @@ const PropertyMap = ({
 
         {/* Existing sections */}
         {sections.map((section) => {
-          if (!section.polygonData?.coordinates?.[0]) return null;
+          console.log('Section:', section);
+          
+          // Handle both string and object polygon data
+          let polygonData = section.polygonData;
+          if (typeof polygonData === 'string') {
+            try {
+              polygonData = JSON.parse(polygonData);
+            } catch (e) {
+              console.error('Failed to parse polygon data:', e);
+              return null;
+            }
+          }
+          
+          if (!polygonData?.coordinates?.[0]) {
+            console.log('No coordinates found for section:', section.id);
+            return null;
+          }
+          
+          const coordinates = polygonData.coordinates[0].map(([lng, lat]) => [lat, lng]);
+          console.log('Mapped coordinates:', coordinates);
           
-          const coordinates = section.polygonData.coordinates[0].map(([lng, lat]) => [lat, lng]);
           const isInternallySelected = selectedSection?.id === section.id;
           const isExternallySelected = selectedSections.includes(section.id);
           const isSelected = isInternallySelected || isExternallySelected;
diff --git a/frontend/src/pages/Applications/Applications.js b/frontend/src/pages/Applications/Applications.js
index 78fdcf6..bc1f42b 100644
--- a/frontend/src/pages/Applications/Applications.js
+++ b/frontend/src/pages/Applications/Applications.js
@@ -6,7 +6,7 @@ import {
   WrenchScrewdriverIcon,
   CalculatorIcon
 } from '@heroicons/react/24/outline';
-import { propertiesAPI, productsAPI, equipmentAPI, applicationsAPI } from '../../services/api';
+import { propertiesAPI, productsAPI, equipmentAPI, applicationsAPI, nozzlesAPI } from '../../services/api';
 import LoadingSpinner from '../../components/UI/LoadingSpinner';
 import PropertyMap from '../../components/Maps/PropertyMap';
 import toast from 'react-hot-toast';
@@ -138,10 +138,12 @@ const Applications = () => {
                   lawnSectionId: parseInt(areaId),
                   equipmentId: parseInt(planData.equipmentId),
                   plannedDate: new Date().toISOString().split('T')[0], // Default to today
-                  notes: planData.notes,
+                  notes: planData.notes || '', // Ensure notes is never null/undefined
                   products: [{
-                    productId: planData.selectedProduct?.isShared ? parseInt(planData.selectedProduct.id) : null,
-                    userProductId: !planData.selectedProduct?.isShared ? parseInt(planData.selectedProduct.id) : null,
+                    ...(planData.selectedProduct?.isShared 
+                      ? { productId: parseInt(planData.selectedProduct.id) }
+                      : { userProductId: parseInt(planData.selectedProduct.id) }
+                    ),
                     rateAmount: parseFloat(planData.selectedProduct?.customRateAmount || planData.selectedProduct?.rateAmount || 1),
                     rateUnit: planData.selectedProduct?.customRateUnit || planData.selectedProduct?.rateUnit || 'per 1000sqft'
                   }]
@@ -170,6 +172,7 @@ const ApplicationPlanModal = ({ onClose, onSubmit }) => {
   const [properties, setProperties] = useState([]);
   const [products, setProducts] = useState([]);
   const [equipment, setEquipment] = useState([]);
+  const [nozzles, setNozzles] = useState([]);
   const [selectedPropertyDetails, setSelectedPropertyDetails] = useState(null);
   const [loading, setLoading] = useState(true);
   const [loadingProperty, setLoadingProperty] = useState(false);
@@ -181,6 +184,7 @@ const ApplicationPlanModal = ({ onClose, onSubmit }) => {
     selectedProduct: null,
     applicationType: '', // 'liquid' or 'granular'
     equipmentId: '',
+    nozzleId: '',
     notes: ''
   });
 
@@ -191,15 +195,17 @@ const ApplicationPlanModal = ({ onClose, onSubmit }) => {
   const fetchPlanningData = async () => {
     try {
       setLoading(true);
-      const [propertiesResponse, productsResponse, equipmentResponse] = await Promise.all([
+      const [propertiesResponse, productsResponse, equipmentResponse, nozzlesResponse] = await Promise.all([
         propertiesAPI.getAll(),
         productsAPI.getAll(),
-        equipmentAPI.getAll()
+        equipmentAPI.getAll(),
+        nozzlesAPI.getAll()
       ]);
       
       console.log('Properties response:', propertiesResponse.data);
       console.log('Products response:', productsResponse.data);
       console.log('Equipment response:', equipmentResponse.data);
+      console.log('Nozzles response:', nozzlesResponse.data);
       
       setProperties(propertiesResponse.data.data.properties || []);
       // Combine shared and user products with unique IDs
@@ -218,6 +224,7 @@ const ApplicationPlanModal = ({ onClose, onSubmit }) => {
       const allProducts = [...sharedProducts, ...userProducts];
       setProducts(allProducts);
       setEquipment(equipmentResponse.data.data.equipment || []);
+      setNozzles(nozzlesResponse.data.data?.nozzles || nozzlesResponse.data || []);
     } catch (error) {
       console.error('Failed to fetch planning data:', error);
       toast.error('Failed to load planning data');
@@ -335,6 +342,7 @@ const ApplicationPlanModal = ({ onClose, onSubmit }) => {
                 {selectedPropertyDetails.latitude && selectedPropertyDetails.longitude && (
                   <div className="mb-4">
                     <div className="relative">
+                      {console.log('Map sections data:', selectedPropertyDetails.sections)}
                       <PropertyMap
                         center={[selectedPropertyDetails.latitude, selectedPropertyDetails.longitude]}
                         zoom={18}
@@ -474,6 +482,36 @@ const ApplicationPlanModal = ({ onClose, onSubmit }) => {
               </div>
             )}
 
+            {/* Nozzle Selection for Liquid Applications */}
+            {planData.applicationType === 'liquid' && (
+              <div>
+                <label className="label flex items-center gap-2">
+                  <BeakerIcon className="h-5 w-5" />
+                  Nozzle Selection
+                </label>
+                <select
+                  className="input"
+                  value={planData.nozzleId}
+                  onChange={(e) => setPlanData({ ...planData, nozzleId: e.target.value })}
+                >
+                  <option value="">Select nozzle (optional)...</option>
+                  {nozzles.map((nozzle) => (
+                    <option key={nozzle.id} value={nozzle.id}>
+                      {nozzle.customName || nozzle.typeName}
+                      {nozzle.orificeSize && ` - ${nozzle.orificeSize}`}
+                      {nozzle.flowRateGpm && ` (${nozzle.flowRateGpm} GPM)`}
+                      {nozzle.sprayAngle && ` ${nozzle.sprayAngle}°`}
+                    </option>
+                  ))}
+                </select>
+                {nozzles.length === 0 && (
+                  <p className="text-sm text-orange-600 mt-1">
+                    No nozzles found. Add nozzles in Equipment management first.
+                  </p>
+                )}
+              </div>
+            )}
+
             {/* Notes */}
             <div>
               <label className="label">Notes</label>