diff -r aa8d421bfc24 -r 35ce719998e1 src/EditProductTab4.cpp
--- a/src/EditProductTab4.cpp	Tue Jun 21 16:16:43 2022 +0200
+++ b/src/EditProductTab4.cpp	Thu Jun 23 16:50:23 2022 +0200
@@ -35,6 +35,14 @@
 }
 
 
+bool EditProduct::block_hop(int stage, int useat)
+{
+    if (stage > PROD_STAGE_BREW && useat < HOP_USEAT_DRY_HOP)
+	return true;
+    return false;
+}
+
+
 void EditProduct::refreshHops()
 {
     QString w;
@@ -111,38 +119,51 @@
         item->setTextAlignment(Qt::AlignRight|Qt::AlignVCenter);
         ui->hopsTable->setItem(i, 8, item);
 
-	if (product->hops.at(i).inventory < 1.0) {
-            item = new QTableWidgetItem(QString("%1 gr").arg(product->hops.at(i).inventory * 1000.0, 2, 'f', 1, '0'));
-        } else {
-            item = new QTableWidgetItem(QString("%1 kg").arg(product->hops.at(i).inventory, 4, 'f', 3, '0'));
-        }
-        item->setTextAlignment(Qt::AlignRight|Qt::AlignVCenter);
-	if (product->hops.at(i).inventory < product->hops.at(i).amount)
-	    item->setForeground(QBrush(QColor(Qt::red)));
+	if (block_hop(product->stage, product->hops.at(i).useat)) {
+	    item = new QTableWidgetItem(QString(""));
+	} else {
+	    if (product->hops.at(i).inventory < 1.0) {
+            	item = new QTableWidgetItem(QString("%1 gr").arg(product->hops.at(i).inventory * 1000.0, 2, 'f', 1, '0'));
+            } else {
+            	item = new QTableWidgetItem(QString("%1 kg").arg(product->hops.at(i).inventory, 4, 'f', 3, '0'));
+            }
+            item->setTextAlignment(Qt::AlignRight|Qt::AlignVCenter);
+	    if (product->hops.at(i).inventory < product->hops.at(i).amount)
+	    	item->setForeground(QBrush(QColor(Qt::red)));
+	}
         ui->hopsTable->setItem(i, 9, item);
 
 	/* Add the Delete row button */
-        pWidget = new QWidget();
-        QPushButton* btn_dele = new QPushButton();
-        btn_dele->setObjectName(QString("%1").arg(i));  /* Send row with the button */
-        btn_dele->setText(tr("Delete"));
-        connect(btn_dele, SIGNAL(clicked()), this, SLOT(deleteHopRow_clicked()));
-        pLayout = new QHBoxLayout(pWidget);
-        pLayout->addWidget(btn_dele);
-        pLayout->setContentsMargins(5, 0, 5, 0);
-        pWidget->setLayout(pLayout);
-        ui->hopsTable->setCellWidget(i, 10, pWidget);
+	if (block_hop(product->stage, product->hops.at(i).useat)) {
+	    item = new QTableWidgetItem("");
+            item->setToolTip(tr("Hop already used"));
+            ui->hopsTable->setItem(i, 10, item);
+            item = new QTableWidgetItem("");
+            item->setToolTip(tr("Hop already used"));
+            ui->hopsTable->setItem(i, 11, item);
+	} else {
+            pWidget = new QWidget();
+            QPushButton* btn_dele = new QPushButton();
+            btn_dele->setObjectName(QString("%1").arg(i));  /* Send row with the button */
+            btn_dele->setText(tr("Delete"));
+            connect(btn_dele, SIGNAL(clicked()), this, SLOT(deleteHopRow_clicked()));
+            pLayout = new QHBoxLayout(pWidget);
+            pLayout->addWidget(btn_dele);
+            pLayout->setContentsMargins(5, 0, 5, 0);
+            pWidget->setLayout(pLayout);
+            ui->hopsTable->setCellWidget(i, 10, pWidget);
 
-        pWidget = new QWidget();
-        QPushButton* btn_edit = new QPushButton();
-        btn_edit->setObjectName(QString("%1").arg(i));  /* Send row with the button */
-        btn_edit->setText(tr("Edit"));
-        connect(btn_edit, SIGNAL(clicked()), this, SLOT(editHopRow_clicked()));
-        pLayout = new QHBoxLayout(pWidget);
-        pLayout->addWidget(btn_edit);
-        pLayout->setContentsMargins(5, 0, 5, 0);
-        pWidget->setLayout(pLayout);
-        ui->hopsTable->setCellWidget(i, 11, pWidget);
+            pWidget = new QWidget();
+            QPushButton* btn_edit = new QPushButton();
+            btn_edit->setObjectName(QString("%1").arg(i));  /* Send row with the button */
+            btn_edit->setText(tr("Edit"));
+            connect(btn_edit, SIGNAL(clicked()), this, SLOT(editHopRow_clicked()));
+            pLayout = new QHBoxLayout(pWidget);
+            pLayout->addWidget(btn_edit);
+            pLayout->setContentsMargins(5, 0, 5, 0);
+            pWidget->setLayout(pLayout);
+            ui->hopsTable->setCellWidget(i, 11, pWidget);
+	}
     }
 }