djangoのhtmlにform-control form-control-smを適用させたい

Question

djangoのhtml上でform-control form-control-smを適用させたいのですがやりたい方分かりません。
<div　class='form-control'>で囲ってみたりしましたが適用されませんでした。
下記htmlはpandasのdfを表示するものになっています。これが原因でできないのでしょうか。
それとも根本的にやり方が間違っているのでしょうか。

html

<table class="table table-bordered"　>

    <div class="container">
        <div class="row">
         
        

    <form action="" method="POST">
        {{ month_formset.management_form }}
       

  <tr> <th class="col-xs-1">User</th></div>
  {% for day in month_day_forms %}
  
  <th class="col-xs-1">{{day | date:"n"}}月{{day | date:"j" }}日 </th> 
 {%endfor%}</tr>

 <tr>
    
{% for index,a in month_day_forms.iterrows %}
<div class="row">
    
<th class="col-xs-1">{{index.last_name}}&nbsp;{{index.first_name}}</th>
<td class="col-xs-1">{{a.0.date}}{{a.0.id}}{{a.0.start_at|as_crispy_field}}{{a.0.end_at|as_crispy_field}}{{a.DELETE}}</td>
<td class="col-xs-1">{{a.1.date}}{{a.1.id}}{{a.1.start_at|as_crispy_field}}{{a.1.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.2.date}}{{a.2.id}}{{a.2.start_at|as_crispy_field}}{{a.2.end_at|as_crispy_field}}</td>

<td class="col-xs-1">{{a.3.date}}{{a.3.id}}{{a.3.start_at|as_crispy_field}}{{a.3.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.4.date}}{{a.4.id}}{{a.4.start_at|as_crispy_field}}{{a.4.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.5.date}}{{a.5.id}}{{a.5.start_at|as_crispy_field}}{{a.5.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.6.date}}{{a.6.id}}{{a.6.start_at|as_crispy_field}}{{a.6.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.7.date}}{{a.7.id}}{{a.7.start_at|as_crispy_field}}{{a.7.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.8.date}}{{a.8.id}}{{a.8.start_at|as_crispy_field}}{{a.8.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.9.date}}{{a.9.id}}{{a.9.start_at|as_crispy_field}}{{a.9.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.10.date}}{{a.10.id}}{{a.10.start_at|as_crispy_field}}{{a.10.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.11.date}}{{a.11.id}}{{a.11.start_at|as_crispy_field}}{{a.11.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.12.date}}{{a.12.id}}{{a.12.start_at|as_crispy_field}}{{a.12.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.13.date}}{{a.13.id}}{{a.13.start_at|as_crispy_field}}{{a.13.end_at|as_crispy_field}}</td>
<td class="col-xs-1">{{a.14.date}}{{a.14.id}}{{a.14.start_at|as_crispy_field}}{{a.14.end_at|as_crispy_field}}</td>
</div>
{% if a.15.start_at == None %}


{% else %}
<div class="col-xs-1"></div><td>{{a.15.date}}{{a.15.id}}{{a.15.start_at}}{{a.15.end_at|as_crispy_field}}</td>
{%endif%}
</div></div></tr>
    
    {%endfor%}
</table>
{% csrf_token %}
<button type="submit" class="btn btn-primary">送信</button>
</form>