Joel Kroin, Founded Hortus USA in 1989 for the purpose of bringing improved methods and material for plant propagation. Plant propagation from cuttings is the most important way to produce clonal (identical) copies of plants. The science of propagation from cuttings has had a golden age in the past quarter century. I developed Hortus IBA Water Soluble Salts, an improved product, to replace pre-mix rooting solutions, IBA and KIBA to make aqueous rooting solutions. I have developed techniques to give improved results and formulated plant rooting products used by many of the largest annual, perennial and woody ornamental plant growers.
Plant Propagation: Basics of single and multiple rooting hormone applications. Cuttings taken fro... more Plant Propagation: Basics of single and multiple rooting hormone applications. Cuttings taken from stock plants are used to propagate new plants. Using needed rooting hormones, growers are sometimes confronted with slow-to-root and hard-to-root cuttings. Multiple Rooting Solution foliar applications may improve root formation. Solutions may be applied once or multiple times in ten day to two week internals, and customized programs. Multiple solution applications use the foliar Spray Drip Down® Method which does not disturb planted cuttings.
Use Rooting Hormones, or Not? Multiple Applications May Be Best
Plant growers know when propagati... more Use Rooting Hormones, or Not? Multiple Applications May Be Best Plant growers know when propagating plants from cuttings, rooting hormones are essential to produce quality roots. The question may come up, if one rooting hormone application is good, are two or more applications better? Plant propagation from cuttings can be performed using rooting hormones by either basal or foliar methods. Basal methods use either dry power rooting hormones or rooting solutions. Foliar methods use aqueous IBA (K-IBA) rooting solutions on leafy cuttings in the growing state. Traditionally these methods have been used by one application. Improving single rooting hormone application, secondary foliar applications may enhance the rooting of slow-to-root cuttings, and may level crops that have difference in growth. The first rooting hormone application, at time of sticking, may be performed by any foliar or basal method. Secondary applications are performed by spraying on leaves by the Spray Drip Down Method. Secondary applications are used on cuttings already in media; subsequent sprays do not disturb the cuttings. Secondary applications have been successful at ten days or two weeks after the first application. Also successful are three day applications in sequence directly after sticking.
Studies relating to the propagation of plants from cuttings. Studies on differences in root forma... more Studies relating to the propagation of plants from cuttings. Studies on differences in root formation of cuttings when foliar applied IBA solutions are made at different days after sticking.
Plant propagation from cuttings, adventitious root formation, is the most important use of rootin... more Plant propagation from cuttings, adventitious root formation, is the most important use of rooting hormones. There are several other ways that these substances can be effectively used including grafting & stenting, layering, and improved transplanting using Hortus and Rhizopon plant rooting hormones. Article includes a case study of rose propagation.
Since the 1930's the plant growth regulator Indole-3-butyric acid (IBA) has been used for rooting... more Since the 1930's the plant growth regulator Indole-3-butyric acid (IBA) has been used for rooting of plant cuttings and other growth processes. Thousands of articles have been written on it as the favorite single compound used to promote rooting. Uses for IBA other than rooting include promoting root regeneration when transplanting rooted plants and to improve grafting. Useful compounds containing IBA are solutions and powders. Solutions of IBA dissolved in water are useful for more purposes than any other compound.
INTRODUCTION Blueberry Tissue Culture (TC) plantlets are often bushier, with heavier cane diamete... more INTRODUCTION Blueberry Tissue Culture (TC) plantlets are often bushier, with heavier cane diameter, increased lateral branching, and higher flower production than those propagated from cuttings. Cuttings are taken from the TC propagated plantlets. The next stage plants pass on the favorable characteristics, resulting in higher fruit production.
It is often necessary to propagate new rose bushes by grafting selected rose cultivars onto rose ... more It is often necessary to propagate new rose bushes by grafting selected rose cultivars onto rose rootstocks. Seedling rootstocks of Rosa canina, a preferred variety, show genetic variation. To develop a uniform crop these variations are not desired. For the most uniform quality rose rootstocks should be vegetatively propagated by the rooting of cuttings. STENTING is a method for the quick propagation of roses. Cutting and grafting is performed in one action. In Dutch the word "Stenting" means "to stem". It is a combination "stekken" meaning "to strike a cutting" and "enter" meaning "to graft". The success of simultaneous cutting and grafting is cost effective. In practice, the scion consists of the cultivar stem taken with one leaf and a dormant bud. The scion is grafted on a single internode of the non-rooted rootstock. Formation of the graft union and of adventitious roots on the rootstock occur simultaneously. The combined process takes three weeks.
Several basal and foliar auxin application methods can be used to propagate plants from cuttings.... more Several basal and foliar auxin application methods can be used to propagate plants from cuttings. Based upon trials, growers can find one or more methods that are suitable for their needs. This is based upon the plant variety, species, seasonal variations, production needs, and the total cost. This article gives tips for use of the foliar methods to apply aqueous rooting solutions.
Comparison of dry dip rooting hormones with aqueous IBA rooting solutions, products, methods and ... more Comparison of dry dip rooting hormones with aqueous IBA rooting solutions, products, methods and special uses
Used to propagate plants from cuttings, foliar applied rooting solutions are used by two methods.... more Used to propagate plants from cuttings, foliar applied rooting solutions are used by two methods. Over a twenty five year period, protocols have been developed for use by commercial growers and gardeners. This article describes the methods and how to make the processes achieve success.
Used to propagate plants from cuttings, foliar applied rooting solutions are used by two methods.... more Used to propagate plants from cuttings, foliar applied rooting solutions are used by two methods. Over a twenty five year period, protocols have been developed for use by commercial growers and gardeners. This article describes the methods and how to make the processes achieve success.
Plant Propagation from Cuttings. A guide to using plant rooting hormones by foliar and basal methods, Dec 1, 2015
Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones a... more Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones are essential to develop roots on cuttings. This Guide describes five successful foliar and basal propagation methods: Five methods of plant propagation from cuttings:. Dry Dip, Basal Quick Dip, Foliar Spray Drip Down, Foliar Total Immerse, Basal Long Soak. The methods use the rooting hormones Hortus IBA Water Soluble Salts® (rooting solutions) & Rhizopon® AA (rooting solutions & dry powders).
INTRODUCTION The present studies were done to guide growers on successful cutting propagation fro... more INTRODUCTION The present studies were done to guide growers on successful cutting propagation from cuttings using water-based indole-3-butyric acid (lBA) rooting solutions. The following four studies: (1) the time of foliar treatment after sticking, (2) the effect of alcohol or wetting agents in the solution, (3) the effect of cold temperature at time of treatment, and (4),the use of basal long-soak method on cuttings which are sea-sonably difficult to root. The present studies used two foliar and one basal method to apply aqueous IBA rooting solutions. Foliar application is only done to leafy cuttings taken during the growing season.
Foliar applied rooting solutions is used to propagate plants from cuttings.
Do's and Don'ts are ... more Foliar applied rooting solutions is used to propagate plants from cuttings. Do's and Don'ts are discussed. This article was presented at the International Plant Propagators Society-Eastern Region meeting, October 2014
Plant Propagation from Cuttings. Newest techniques to use foliar applied aqueous IBA rooting Solu... more Plant Propagation from Cuttings. Newest techniques to use foliar applied aqueous IBA rooting Solutions for rooting of cuttings. Use of the Spray Drip Down Method and Total Immerse Method
Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones a... more Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones are essential to develop roots on cuttings. This Guide describes five successful foliar and basal propagation methods: Five methods of plant propagation from cuttings:. Dry Dip, Basal Quick Dip, Foliar Spray Drip Down, Foliar Total Immerse, Basal Long Soak. The methods use the rooting hormones Hortus IBA Water Soluble Salts® (rooting solutions) & Rhizopon® AA (rooting solutions & dry powders).
Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones a... more Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones are essential to develop roots on cuttings. This Guide describes five successful foliar and basal propagation methods. The methods use the rooting hormones Hortus IBA Water Soluble Salts® (rooting solutions) & Rhizopon® AA (rooting solutions & dry powders).
Five methods of plant propagation from cuttings: Dry Dip, Basal Quick Dip, Foliar Spray Drip Down, Foliar Total Immerse, Basal Long Soak
Plant propagation from cuttings produces new plants that are clonal genetically the same as the p... more Plant propagation from cuttings produces new plants that are clonal genetically the same as the parent plant. This book includes history of propagation, methods and material, user background.
Plant Propagation: Basics of single and multiple rooting hormone applications. Cuttings taken fro... more Plant Propagation: Basics of single and multiple rooting hormone applications. Cuttings taken from stock plants are used to propagate new plants. Using needed rooting hormones, growers are sometimes confronted with slow-to-root and hard-to-root cuttings. Multiple Rooting Solution foliar applications may improve root formation. Solutions may be applied once or multiple times in ten day to two week internals, and customized programs. Multiple solution applications use the foliar Spray Drip Down® Method which does not disturb planted cuttings.
Use Rooting Hormones, or Not? Multiple Applications May Be Best
Plant growers know when propagati... more Use Rooting Hormones, or Not? Multiple Applications May Be Best Plant growers know when propagating plants from cuttings, rooting hormones are essential to produce quality roots. The question may come up, if one rooting hormone application is good, are two or more applications better? Plant propagation from cuttings can be performed using rooting hormones by either basal or foliar methods. Basal methods use either dry power rooting hormones or rooting solutions. Foliar methods use aqueous IBA (K-IBA) rooting solutions on leafy cuttings in the growing state. Traditionally these methods have been used by one application. Improving single rooting hormone application, secondary foliar applications may enhance the rooting of slow-to-root cuttings, and may level crops that have difference in growth. The first rooting hormone application, at time of sticking, may be performed by any foliar or basal method. Secondary applications are performed by spraying on leaves by the Spray Drip Down Method. Secondary applications are used on cuttings already in media; subsequent sprays do not disturb the cuttings. Secondary applications have been successful at ten days or two weeks after the first application. Also successful are three day applications in sequence directly after sticking.
Studies relating to the propagation of plants from cuttings. Studies on differences in root forma... more Studies relating to the propagation of plants from cuttings. Studies on differences in root formation of cuttings when foliar applied IBA solutions are made at different days after sticking.
Plant propagation from cuttings, adventitious root formation, is the most important use of rootin... more Plant propagation from cuttings, adventitious root formation, is the most important use of rooting hormones. There are several other ways that these substances can be effectively used including grafting & stenting, layering, and improved transplanting using Hortus and Rhizopon plant rooting hormones. Article includes a case study of rose propagation.
Since the 1930's the plant growth regulator Indole-3-butyric acid (IBA) has been used for rooting... more Since the 1930's the plant growth regulator Indole-3-butyric acid (IBA) has been used for rooting of plant cuttings and other growth processes. Thousands of articles have been written on it as the favorite single compound used to promote rooting. Uses for IBA other than rooting include promoting root regeneration when transplanting rooted plants and to improve grafting. Useful compounds containing IBA are solutions and powders. Solutions of IBA dissolved in water are useful for more purposes than any other compound.
INTRODUCTION Blueberry Tissue Culture (TC) plantlets are often bushier, with heavier cane diamete... more INTRODUCTION Blueberry Tissue Culture (TC) plantlets are often bushier, with heavier cane diameter, increased lateral branching, and higher flower production than those propagated from cuttings. Cuttings are taken from the TC propagated plantlets. The next stage plants pass on the favorable characteristics, resulting in higher fruit production.
It is often necessary to propagate new rose bushes by grafting selected rose cultivars onto rose ... more It is often necessary to propagate new rose bushes by grafting selected rose cultivars onto rose rootstocks. Seedling rootstocks of Rosa canina, a preferred variety, show genetic variation. To develop a uniform crop these variations are not desired. For the most uniform quality rose rootstocks should be vegetatively propagated by the rooting of cuttings. STENTING is a method for the quick propagation of roses. Cutting and grafting is performed in one action. In Dutch the word "Stenting" means "to stem". It is a combination "stekken" meaning "to strike a cutting" and "enter" meaning "to graft". The success of simultaneous cutting and grafting is cost effective. In practice, the scion consists of the cultivar stem taken with one leaf and a dormant bud. The scion is grafted on a single internode of the non-rooted rootstock. Formation of the graft union and of adventitious roots on the rootstock occur simultaneously. The combined process takes three weeks.
Several basal and foliar auxin application methods can be used to propagate plants from cuttings.... more Several basal and foliar auxin application methods can be used to propagate plants from cuttings. Based upon trials, growers can find one or more methods that are suitable for their needs. This is based upon the plant variety, species, seasonal variations, production needs, and the total cost. This article gives tips for use of the foliar methods to apply aqueous rooting solutions.
Comparison of dry dip rooting hormones with aqueous IBA rooting solutions, products, methods and ... more Comparison of dry dip rooting hormones with aqueous IBA rooting solutions, products, methods and special uses
Used to propagate plants from cuttings, foliar applied rooting solutions are used by two methods.... more Used to propagate plants from cuttings, foliar applied rooting solutions are used by two methods. Over a twenty five year period, protocols have been developed for use by commercial growers and gardeners. This article describes the methods and how to make the processes achieve success.
Used to propagate plants from cuttings, foliar applied rooting solutions are used by two methods.... more Used to propagate plants from cuttings, foliar applied rooting solutions are used by two methods. Over a twenty five year period, protocols have been developed for use by commercial growers and gardeners. This article describes the methods and how to make the processes achieve success.
Plant Propagation from Cuttings. A guide to using plant rooting hormones by foliar and basal methods, Dec 1, 2015
Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones a... more Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones are essential to develop roots on cuttings. This Guide describes five successful foliar and basal propagation methods: Five methods of plant propagation from cuttings:. Dry Dip, Basal Quick Dip, Foliar Spray Drip Down, Foliar Total Immerse, Basal Long Soak. The methods use the rooting hormones Hortus IBA Water Soluble Salts® (rooting solutions) & Rhizopon® AA (rooting solutions & dry powders).
INTRODUCTION The present studies were done to guide growers on successful cutting propagation fro... more INTRODUCTION The present studies were done to guide growers on successful cutting propagation from cuttings using water-based indole-3-butyric acid (lBA) rooting solutions. The following four studies: (1) the time of foliar treatment after sticking, (2) the effect of alcohol or wetting agents in the solution, (3) the effect of cold temperature at time of treatment, and (4),the use of basal long-soak method on cuttings which are sea-sonably difficult to root. The present studies used two foliar and one basal method to apply aqueous IBA rooting solutions. Foliar application is only done to leafy cuttings taken during the growing season.
Foliar applied rooting solutions is used to propagate plants from cuttings.
Do's and Don'ts are ... more Foliar applied rooting solutions is used to propagate plants from cuttings. Do's and Don'ts are discussed. This article was presented at the International Plant Propagators Society-Eastern Region meeting, October 2014
Plant Propagation from Cuttings. Newest techniques to use foliar applied aqueous IBA rooting Solu... more Plant Propagation from Cuttings. Newest techniques to use foliar applied aqueous IBA rooting Solutions for rooting of cuttings. Use of the Spray Drip Down Method and Total Immerse Method
Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones a... more Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones are essential to develop roots on cuttings. This Guide describes five successful foliar and basal propagation methods: Five methods of plant propagation from cuttings:. Dry Dip, Basal Quick Dip, Foliar Spray Drip Down, Foliar Total Immerse, Basal Long Soak. The methods use the rooting hormones Hortus IBA Water Soluble Salts® (rooting solutions) & Rhizopon® AA (rooting solutions & dry powders).
Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones a... more Plant Propagation from Cuttings produces new plants identical to stock plants. Rooting Hormones are essential to develop roots on cuttings. This Guide describes five successful foliar and basal propagation methods. The methods use the rooting hormones Hortus IBA Water Soluble Salts® (rooting solutions) & Rhizopon® AA (rooting solutions & dry powders).
Five methods of plant propagation from cuttings: Dry Dip, Basal Quick Dip, Foliar Spray Drip Down, Foliar Total Immerse, Basal Long Soak
Plant propagation from cuttings produces new plants that are clonal genetically the same as the p... more Plant propagation from cuttings produces new plants that are clonal genetically the same as the parent plant. This book includes history of propagation, methods and material, user background.
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Papers by Joel Kroin
Plant growers know when propagating plants from cuttings, rooting hormones are essential to produce quality roots. The question may come up, if one rooting hormone application is good, are two or more applications better? Plant propagation from cuttings can be performed using rooting hormones by either basal or foliar methods. Basal methods use either dry power rooting hormones or rooting solutions. Foliar methods use aqueous IBA (K-IBA) rooting solutions on leafy cuttings in the growing state. Traditionally these methods have been used by one application. Improving single rooting hormone application, secondary foliar applications may enhance the rooting of slow-to-root cuttings, and may level crops that have difference in growth. The first rooting hormone application, at time of sticking, may be performed by any foliar or basal method. Secondary applications are performed by spraying on leaves by the Spray Drip Down Method. Secondary applications are used on cuttings already in media; subsequent sprays do not disturb the cuttings. Secondary applications have been successful at ten days or two weeks after the first application. Also successful are three day applications in sequence directly after sticking.
Do's and Don'ts are discussed.
This article was presented at the International Plant Propagators Society-Eastern Region meeting, October 2014
Books by Joel Kroin
Five methods of plant propagation from cuttings:
Dry Dip, Basal Quick Dip, Foliar Spray Drip Down, Foliar Total Immerse, Basal Long Soak
Plant growers know when propagating plants from cuttings, rooting hormones are essential to produce quality roots. The question may come up, if one rooting hormone application is good, are two or more applications better? Plant propagation from cuttings can be performed using rooting hormones by either basal or foliar methods. Basal methods use either dry power rooting hormones or rooting solutions. Foliar methods use aqueous IBA (K-IBA) rooting solutions on leafy cuttings in the growing state. Traditionally these methods have been used by one application. Improving single rooting hormone application, secondary foliar applications may enhance the rooting of slow-to-root cuttings, and may level crops that have difference in growth. The first rooting hormone application, at time of sticking, may be performed by any foliar or basal method. Secondary applications are performed by spraying on leaves by the Spray Drip Down Method. Secondary applications are used on cuttings already in media; subsequent sprays do not disturb the cuttings. Secondary applications have been successful at ten days or two weeks after the first application. Also successful are three day applications in sequence directly after sticking.
Do's and Don'ts are discussed.
This article was presented at the International Plant Propagators Society-Eastern Region meeting, October 2014
Five methods of plant propagation from cuttings:
Dry Dip, Basal Quick Dip, Foliar Spray Drip Down, Foliar Total Immerse, Basal Long Soak