<div class="form-group textarea">
    <label for="feedback" class="control-label">Hoe was uw overnachting?</label>
    <div class="field-container">
        <textarea class="form-control" id="feedback" rows="10"></textarea>
    </div>
</div>
<div class="form-group textarea">
  <label for="{{ id }}" class="control-label">{{ label }}</label>
  <div class="field-container">
    <textarea class="form-control" id="{{ id }}" {{{ifattr 'rows' rows }}}></textarea>
    {{#if helpText }}
      {{> '@help-block' }}
    {{/if}}
  </div>
</div>
id: feedback
label: Hoe was uw overnachting?
rows: 10

Attribuut @rows is optioneel