.post-entry ul, .post-entry li{margin: 1em 0;}.newgenbtn{display: block;text-align: center;border: 2px solid #fff;padding: 20px 0px;font-weight: 700;font-size: 1.1rem;font-family: 'Oxygen', sans-serif, Arial, Helvetica;color: #fff;text-decoration: none;position:relative;}.newgenbtn.inblock{padding: 20px;display: inline-block;}.lillinkicon{position: absolute;width: 20px;height: 20px;background: url(https://questions.gardeningknowhow.com/wp-content/themes/yourgardenxq/imgs/greysocials.png) -442px 0px no-repeat;top: 5px;right: 5px;}.newgenbtn:hover .lillinkicon{opacity: 0.7;}a.wpr_genpost_readmore {color:#3a6d25;font-family: 'Seaweed Script', cursive;font-size: 1.25rem;text-decoration: none;}.readmorearrow{content: " ";border-left: 7px solid #3a6d25;border-top: 4px solid transparent;border-bottom: 4px solid transparent;width: 0;height: 0;position: relative;display: inline-block;margin-left: 5px;}.required{color: #a00;}header #topsearchbar.floater td.gsc-input{display:block;}#main-art{margin-bottom: 30px;}#joinusbluebox{background: #338dc9;position: relative;display:-ms-flexbox;display: flex;overflow: hidden;color: #fff;justify-content: center;align-items: center;flex-wrap: wrap;min-height: 97px;padding-top: 20px;padding-bottom: 20px;}#joinusbluebox .newsletterformform{flex: 0 1 100%;}#joinusbluebox .responsemsg{flex: 0 1 100%;justify-content:center;}#joinusbluebox .watermark{opacity: 1;z-index: 1;}#joinusbluebox .seaweed{font-size: 2.2rem;}#joinusbluebox .joinconvince{font-size: 1.25rem;margin: 0px 20px 0px 10px;z-index: 1;}#joinusbluebox .newsletterinput{margin-bottom: 7px;margin-top: 7px;z-index: 1;}#joinusbluebox .newsletterbutton{z-index: 1;}#gomodal{display:none;}#genmodal{box-shadow: 0 0 20px #111;-moz-box-shadow: 0 0 20px #111;-webkit-box-shadow: 0 0 20px #111;display:none;}.messagemodal{display: none;position: fixed;z-index: 1;left: 0;top: 0;width: 100%;height: 100%;overflow: auto;background-color: rgba(119, 119, 119, 0.7);z-index:25;}.modalcontent{background-color: #fefefe;margin: 35% auto;padding: 20px;border: 3px solid rgba(0, 0, 0, 0.7);width: 90%;font-size:1.3rem;text-align:center;}.closemodal{color: #fff;font-size: 1rem;background:#79a642;text-align:center;width: 150px;display: block;padding: 7px 0px;margin: 20px auto;cursor: pointer;}.errorsubmit{padding: 10px;background: #F8FFD1;}.errorsubmit li{color: #FF1C00;font-size:1.2rem;}footer{background: #338dc9;color #fff;border-top: 1px solid #fff;overflow: hidden;color: #fff;position:relative;}footer #footer-wrapper {margin-top: 45px;}footer #footer-wrapper .copyright{margin-top: 30px;position:relative;z-index:2;left:20px}footer .liner{border-top: 2px solid #fcaf1b;margin-bottom: 5px;display: inline-block;width: 100%;clear: both;height: 1px;}footer #footerlogo{background: #79a642;text-align: center;border: 2px solid #fff;padding: 30px;margin-bottom: 10px;}footer .othersites .blgbtn{margin-bottom: 10px;}footer .othersites .newgenbtn.blg{background: #a69242}footer h5{color: #fff;margin-top: 0px;font-weight: 700;font-size: 1.3rem;}footer ul.footer-menu{margin: 0px;padding: 0px;list-style-type: none;}footer ul.footer-menu li{display: block;margin-bottom: 30px;}footer ul.footer-menu li a{color:#fff;font-size: 1.1rem;text-decoration: none;border-bottom: 1px solid #fff;font-weight: 100;padding: 4px 0px;display: inline;}footer ul.footer-menu li a:hover{opacity: 0.7;}footer #footnewsltr{margin-top: 30px;margin-bottom: 40px;}footer .newsletterinput{margin-bottom: 7px;}footer .newslettersubmit{background: rgba(250, 255, 83, 0.75);color: #fff;border: 1px solid #fff;font-size: .9rem;height:42px;width: 100%;cursor: pointer;}footer .footersocials{text-align: center;}footer .logowatermark{position: absolute;bottom: 0px;right: 0px;background: url(https://questions.gardeningknowhow.com/wp-content/themes/yourgardenxq/imgs/homegraphics.png) -445px 0px no-repeat;width: 557px;height: 464px;z-index: 0;}#bounce{position: fixed;top: 0;left: 0;width: 100%;height: 100%;color: #fff;z-index:5}#bounce .underlay{width: 100%;height: 100%;position: absolute;top: 0;left: 0;background-color:rgba(0,0,0,0.5);cursor: pointer;-webkit-animation: fadein 0.5s;animation: fadein 0.5s;}#bounce .modalflex{display:-ms-flexbox;display: flex;justify-content: center;align-items: center;position: absolute;bottom: 0;left: 0;right: 0;top: 0;}#bounce .modal{width: 100%;max-width: 600px;background-color: #338dc9;z-index: 1;position: relative;margin: auto;-webkit-animation: popin 0.3s;animation: popin 0.3s;padding: 15px;}#bounce .watermark, #joinusbluebox .watermark{position: absolute;top: 0px;right: 0px;background: url(https://questions.gardeningknowhow.com/wp-content/themes/yourgardenxq/imgs/homegraphics.png) 0 0 no-repeat;width: 140px;height: 140px;background-position: 0px 0px;opacity: 0.2;}#bounce .newsletterbutton{padding-left: 3px;}#bounce .newsletterinput{padding-right: 3px;}#bounce .newsletterform{margin-bottom: 7px;}#bounce .newslettersubmit, #joinusbluebox .newslettersubmit{background: transparent;color: #fff;border: 1px solid #fff;font-size: .9rem;height: 42px;width: 100%;cursor: pointer;}#bounce .modalclose{font-family: 'Oxygen', sans-serif, Arial, Helvetica;cursor: pointer;position:relative;margin-top: -10px;right: -8px;font-size: .95rem;z-index: 3;float: right;font-weight: 700;}#bounce .signupwords{display: block;width: 100%;text-align: center;display:flex;justify-content:center;}#bounce .modaltitle{text-align: right;}#bounce .seaweed{font-size: 2.2rem;min-width: 118px;}#bounce .joinconvince{font-size: 1.23rem;position:relative;margin-left: 7px;top: 9px;}#bounce .responsemsg{text-align: center;margin-bottom: 10px;}#homesidelearn{background: url(https://questions.gardeningknowhow.com/wp-content/themes/yourgardenxq/imgs/farmerfaces.jpg) 0 0 no-repeat;background-size: cover;color: #fff;padding: 30px 0px;text-align:center;}#homesidelearn .learninbox {max-width: 70%;margin: 0px auto;}#homesidelearn .insideit{background: rgba(48, 81, 0, 0.7);}#homesidelearn .insideit p{margin-top: -17px;}#homesidelearn .tilte{position: relative;top: -17px;}#abovefooterblock{width: 100%;overflow: hidden;background: url(https://questions.gardeningknowhow.com/wp-content/themes/yourgardenxq/imgs/speckledbackorange.jpg) 0 0 repeat;padding: 20px 0;}.faceandlogo{position: relative;margin-right: 20px;float: left;width: 110px;height: 110px;}.circlelogo{position: absolute;width: 50px;height: 50px;background: url(https://questions.gardeningknowhow.com/wp-content/themes/yourgardenxq/imgs/homegraphics.png) -347px -417px no-repeat;bottom: -15px;left: 0px;}.footorangecontent{align-items: center;}.footexpertbutton{background: #338dc9;color: white;padding: 10px 15px;font-size: 23px;}.footknowgardening h2{color: #fff;margin-left: 20px;}.facelogomobile{display: flex;justify-content: center;flex-flow: wrap;}.footclickknow{text-align: center;}body.single-post h1, body.page h1{font-size:2.4rem}body.single-post h2, body.page h2{font-size:1.8rem}body.single-post h3, body.page h3{font-size:1.65rem;}.printerbutn {background: url(https://questions.gardeningknowhow.com/wp-content/themes/yourgardenxq/imgs/greysocials.png) -492px 0px no-repeat;width: 32px;height: 29px;display: inline-block;margin-right: 10px;}body.single #share-articles{margin: 20px 0px;}body.single #share-articles .sharehead{font-size: 1.5rem;margin-bottom: 20px;line-height: 1.4;color: #3a6d25;}body.single #asharedbox .sharebtns{margin-left: -20px;}.shared-counts-wrap.style-icon .shared-counts-button .shared-counts-icon{width: 50px;height: 33px;}.shared-counts-wrap.style-icon .shared-counts-button .shared-counts-icon svg {fill: #fcaf1b;width: 33px;height: 33px;}.lookingmore{display: inline-block;clear: both;margin: 10px auto;width: 100%;padding: 20px;background: #f9f6e9;font-family: 'Oxygen', sans-serif, Arial, Helvetica;color: #595959;margin: 70px auto 50px auto;}.lookingmore .lookbig{display: inline;font-size: 1.35rem;margin-right: 10px;line-height: 2;}.lookingmore .looksmall{display: inline;}.lookingmore .lookclick{display: inline-block;float: none;width:100%;margin-top:20px;text-align:center;border: 3px solid #fcaf1b;padding: 7px 12px;color: #fcaf1b;}label.notblue{color: #333333;;}.answerheader{height:70px;display:flex;align-items:center;background:#f4f1f1;}.answerheader .theqaletters{top: -15px;}.answerheader .widget-title{color: #c1c2be;font-size: 1rem;}.single-post .answerheader .spaceforQA{width: calc(100% - 70px);}.answerheader .answerit{float:right;}.singleanswer hr{margin: 15px auto;background: #f4f1f1;}.whouser{text-align: center;}.userwho, .answereddate, .single-post .singleanswer{color: #82847e;}.userwho hr{background: #338dc9;margin: 5px;}.userwho .usrnnm{color: #305100;}.userwho .center{display: block;font-weight: 700;font-size: .75rem;color: #338dc9;}.singleanswer hr{margin: 15px auto;}#allcomments{background: #fbfaf9;}#theanswers{padding: 20px 20px 20px 0px;}.loginandprint{margin: 30px auto;}#answerq{width: 100%;display: inline-block;margin-top: 45px;}.answerqbox{background: #fbfaf9;padding: 20px;margin: 0px auto;width: 100%;}.stuffholdercenter{width: 100%;position:relative;}.answerqtext{float:left;width:100%;}.postanswer{color: #fff;padding: 10px 20px;background:#338dc9;float: none;cursor: pointer;display: inline-block;width: 100%;margin: 10px auto;text-align: center;}.subscribetopost{width:100%;display:inline-block;margin:12px auto;}#forohforpage .error h1, #nonefound .error h1{color: #305100;}#forohforpage .error .pseudosearchbtn, #nonefound .error .pseudosearchbtn{border:none;background: #79a642;color: #ffffff;cursor: pointer;width: 100%;height: 100%;display: flex;align-items: center;justify-content: center;}#forohforpage .error .clickforsearch, #nonefound .error .clickforsearch{height: 45px;margin-top: 20px;}.fromshortcode.form{margin-top: 50px;margin-left:-15px;margin-right:-15px;}.fromshortcode input{border-radius:0px;border:1px solid #efefef;margin:10px 0px;}.fromshortcode button{margin: 10px 0px;}.fromshortcode label span{display:inline-block;color:#ca0000;margin-left:5px;}.fromshortcode .newslettersubmit{display: block;width: 100%;-webkit-border-radius: 0px;border-radius: 0px;border: none;background: #79a642;color: #fff;font-size: 1.3rem;padding: 5px 0px;cursor: pointer;}@media (min-width: 576px){.modalcontent{width: 80%;margin: 15% auto;}.modalclose{width: 200px;}body.home #ghomewidgets ul{display:-ms-flexbox;display: flex;}body.home #ghomewidgets a.genposts_linktitle{padding-right: 5px;}body.home #ghomewidgets li{max-width: 100%;}}@media (min-width: 768px){#joinusbluebox .newsletterformform{flex: 0 1 auto;align-items: center;align-content: center;justify-content: center;}#joinusbluebox .newsletterinput{padding-right: 2px;margin-bottom: 0px;margin-top: 0px;}#joinusbluebox .newsletterbutton{padding-left: 2px;}.modalcontent{width: 70%;}.whouser{text-align: left;}.answerqtext{float:left;width:70%;}.postanswer{float:right;display:block;width:auto;margin:0px;}.lookingmore .lookclick{display: block;float: right;width:auto;margin-top:0px;}footer .othersites .newgenbtn{font-size: 1rem;}footer .othersites .blgbtn{padding-right: 3px;margin-bottom: 0px;}footer .othersites .quabtn{padding-left: 3px;}footer ul.footer-menu li{margin-bottom: 12px;}footer ul.footer-menu li a{padding: 0px;}footer .newsletterinput{padding-right:2px;margin-bottom: 0px;}footer .newsletterbutton{padding-left: 2px;}footer .footersocials{text-align: left;}body.home #ghomewidgets ul{display: block;}body.home #ghomewidgets a.genposts_linktitle{padding-right: 0px;}#sticky-footer{z-index: 214 !important;}#forohforpage .error .clickforsearch{height: 100%;margin-top: 0px;}}@media (min-width: 992px){.modalcontent{width: 60%;}body.home #ghomewidgets .imconti img{max-width: 85px;}.facelogomobile{display: block;}.footclickknow{text-align:left;}}@media (min-width: 1200px){.modalcontent{width: 50%;}body.archive #joinusbluebox .joinconvince{margin-bottom: 0px;}}

What's your question? Ask

Hyacinth Plant

Q.Rose Black Spot

Anonymous added on March 12, 2014 | Answered

What spray mixture is most effective once black spot begins appearing on rose leaves?

Nikki

Certified GKH Gardening Expert

Answered on March 12, 2014

A series of spray applications of a fungicide called Mancozeb will usually stop black spot in its tracks. This article should help as well: https://www.gardeningknowhow.com/ornamental/flowers/roses/black-spot-roses.htm

Was this answer useful?

Printer Friendly Version

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Looking for more?

here are more questions about...

Hyacinth Plant

Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert

Learn More

What's your question? Ask

Q.Rose Black Spot

Do you know a lot about gardening?Become a GKH Gardening Expert

Do you know a lot about gardening?
Become a GKH Gardening Expert