Help Please Widget container error on home page

I have a weird issue on a home page, https://justonetree.org/ which doesn’t occur elsewhere on the site.

It’s involves the #supplementary .widget-container of the home page (at the bottom). No where else does this extend beyond the wrapper width. Any ideas why is happening on the home page? Could be the home.php or css but I don’t know what changed as I’ve taken over someone else’s site.
Thanks much.

This code
<div id=”supplementary” style=”background-color:#FFFFFF;”>
<li id=”text-3″ class=”widget-container widget_text”>
<h3 class=”widget-title”>Got a Tree?</h3>
<div class=”textwidget”>Help us reach our goal of 12,000 lemon trees by registering yours today, Register it HERE.

Check out our Lemon Map of San Francisco. </div>

<li id=”text-2″ class=”widget-container widget_text”>
<h3 class=”widget-title”>Want a Tree?</h3>
<div class=”textwidget”>Our first goal with Just One Tree is to become sustainable in Lemon Trees.

Find out why we have selected lemons. </div>

<li id=”text-4″ class=”widget-container widget_text”>
<h3 class=”widget-title”>Plant a Tree!</h3>
<div class=”textwidget”>Your Meyer Lemon: what you need to know, and where you need to go…

Here’s a list of nurseries</div>

</div>