<?xml version="1.0" encoding="us-ascii"?>
<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2022-07-26T12:54:58.3120043+00:00 -->
<!-- Version            : 5.0.1.747 -->
<!-- Package ID         : 72b496234d53450e80befc5109b3d623 -->
<!-- Copyright (c) 2022 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema xmlns:dei="http://xbrl.sec.gov/dei/2022" xmlns:us-types="http://fasb.org/us-types/2022" xmlns:stpr="http://xbrl.sec.gov/stpr/2022" xmlns:srt-types="http://fasb.org/srt-types/2022" xmlns:sic="http://xbrl.sec.gov/sic/2022" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:srt="http://fasb.org/srt/2022" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:us-gaap="http://fasb.org/us-gaap/2022" xmlns:naics="http://xbrl.sec.gov/naics/2022" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:country="http://xbrl.sec.gov/country/2022" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:currency="http://xbrl.sec.gov/currency/2022" xmlns:exch="http://xbrl.sec.gov/exch/2022" xmlns:lxu="http://www.lsbindustries.com/20220727" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.lsbindustries.com/20220727" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase" />
  <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <xsd:import schemaLocation="https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd" namespace="http://xbrl.org/2020/extensible-enumerations-2.0" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/country/2022/country-2022.xsd" namespace="http://xbrl.sec.gov/country/2022" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/currency/2022/currency-2022.xsd" namespace="http://xbrl.sec.gov/currency/2022" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/dei/2022/dei-2022.xsd" namespace="http://xbrl.sec.gov/dei/2022" />
  <xsd:import schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd" namespace="http://www.xbrl.org/dtr/type/2020-01-21" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/exch/2022/exch-2022.xsd" namespace="http://xbrl.sec.gov/exch/2022" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/role/negated" />
  <xsd:import schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" namespace="http://www.xbrl.org/2009/role/net" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/naics/2022/naics-2022.xsd" namespace="http://xbrl.sec.gov/naics/2022" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/sic/2022/sic-2022.xsd" namespace="http://xbrl.sec.gov/sic/2022" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd" namespace="http://fasb.org/srt/2022" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-roles-2022.xsd" namespace="http://fasb.org/srt-roles/2022" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-types-2022.xsd" namespace="http://fasb.org/srt-types/2022" />
  <xsd:import schemaLocation="https://xbrl.sec.gov/stpr/2022/stpr-2022.xsd" namespace="http://xbrl.sec.gov/stpr/2022" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd" namespace="http://fasb.org/us-gaap/2022" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd" namespace="http://fasb.org/us-roles/2022" />
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-types-2022.xsd" namespace="http://fasb.org/us-types/2022" />
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType id="TemplateLink" roleURI="http://www.lsbindustries.com/20220727/role/TemplateLink" xmlns:link="http://www.xbrl.org/2003/linkbase">
        <link:definition>00000 - Document - Template Link</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lxu-20220727_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:title="Definition Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lxu-20220727_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="lxu-20220727_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation Links, all" xlink:type="simple" />
      <link:roleType roleURI="http://www.lsbindustries.com/20220727/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
</xsd:schema>
