diff --git a/app/Console/Commands/OneOff/PopulateTreeSpeciesResearch.php b/app/Console/Commands/OneOff/PopulateTreeSpeciesResearch.php
index 81c7b18c..a05253fb 100644
--- a/app/Console/Commands/OneOff/PopulateTreeSpeciesResearch.php
+++ b/app/Console/Commands/OneOff/PopulateTreeSpeciesResearch.php
@@ -63,14 +63,15 @@ public function handle()
                 $bulkInsert = [];
                 while ($csvRow = fgetcsv($fileHandle)) {
                     $data = [];
-                    $now = Carbon::now();
                     foreach ($this->columns as $column => $index) {
-                        $data[$column] = $csvRow[$index];
-                        // These don't get set automatically with bulk insert
-                        $data['created_at'] = $now;
-                        $data['updated_at'] = $now;
+                        $data[$column] = $csvRow[$index] == 'NA' ? null : $csvRow[$index];
                     }
 
+                    // These don't get set automatically with bulk insert
+                    $now = Carbon::now();
+                    $data['created_at'] = $now;
+                    $data['updated_at'] = $now;
+
                     try {
                         $existing = TreeSpeciesResearch::where('scientific_name', $data['scientific_name'])->first();
                         $this->assert(
diff --git a/database/migrations/2024_12_16_200032_allow_null_infraspecific_epithet.php b/database/migrations/2024_12_16_200032_allow_null_infraspecific_epithet.php
new file mode 100644
index 00000000..162d74f2
--- /dev/null
+++ b/database/migrations/2024_12_16_200032_allow_null_infraspecific_epithet.php
@@ -0,0 +1,27 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration {
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('tree_species_research', function (Blueprint $table) {
+            $table->string('infraspecific_epithet')->nullable()->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('tree_species_research', function (Blueprint $table) {
+            $table->string('infraspecific_epithet')->nullable(false)->change();
+        });
+    }
+};