Fertilizers

Nutrient monitoring of garden mum

Chrysanthemums require medium to high fertility of 150 to 300 ppm N. Optimal substrate pH values for chrysanthemums range from 5.8 to 6.2. Chrysanthemums are susceptible to high substrate pH and soluble salts. Substrate pH above 6.5 inhibits iron availability and induce interveinal chlorosis (yellowing).…

Nutrient monitoring of pansy

Pansies require low fertility of 100 to 150 ppm N. Optimal substrate pH values for pansies range from 5.5 to 5.8. Pansies can develop both low and high substrate pH disorders. If substrate pH drifts lower than 5.5, iron (Fe) and/or manganese toxicity occurs and is observed as lower leaf black spotting. Substrate pH values above…

Nutrient monitoring of poinsettia

Poinsettias require medium to high fertility levels between 150 and 300 ppm N, with the rate adjusted to take into account plant vigor. Optimal substrate pH values for poinsettia range from 5.5 to 6.5. If the substrate pH drifts lower than 5.5, plants will become stunted and color delayed. Substrate pH…

"Vermiculite has a high total-porosity and has good nutrient-holding ability"

In this video, Horticulture Specialist Troy Buechel talks about one of the PRO-MIX growing media components: vermiculite. Vermiculite is an expanded aluminum-iron, magnesium silicate mineral ore that is mined throughout the world. Vermiculite has a high total-porosity and has good nutrient-holding…

Plant Product launches PurKote controlled release fertilizer

The Plant Products booth had a lot of activity and “bounce” as they launched PurKote CRF at Cultivate ’19 this past weekend in Columbus, Ohio. Customers were intrigued by the purple shoes and the sound of basketballs as the show went on. PurKote is manufactured by Pursell Agri-Tech, located in Sylacauga,…

Hydrochar-amended substrates for containerized pine tree seedlings

There is a growing body of research that recognizes the potentials of biochar application in agricultural production systems. However, little is known about the effects of biochar, especially hydrochar, on production of containerized seedlings under nursery conditions. A study published by Agronomy aimed…

Nutrient monitoring of wax leaf begonia

Wax leaf begonias require low to medium fertility levels between 100 and 200 ppm N. Insufficient fertility results in an overall chlorotic (yellow) cast, stunted plant growth, and in green-leaf varieties, reddening of the leaf margins and interveinal spotting. Optimal substrate pH values range from 5.5…

Advice for fertilizer compostition

"Don't serve your crops fast food"

The right amount and composition of fertilizer is crucial for growing plants. After working at Syngenta Flowers for over 40 years, Technical Specialist Ben Geijtenbeek knows what kind of ‘dinner’ crops love the best. In this regards, he knows one thing for sure: don’t serve your crops a fast food menu.…

Nutrient monitoring of vinca

Vinca require low fertility levels between 100 and 150 ppm N. Low fertility results in chlorotic (yellow) stunted plants with an upright leaf orientation. Optimal substrate pH values range from 5.5 to 5.8. If the substrate pH drifts <5.5, iron (Fe) and manganese can accumulate at toxic levels and observed as lower leaf black…

Nutrient monitoring of snapdragon

Snapdragons require low to medium fertility levels between 100 and 200 ppm N. Optimal substrate pH values for snapdragons range from 5.5 to 6.2. Snapdragons can develop high substrate pH disorders if the substrate pH rises above 6.5. Inhibited iron availability due to high substrate pH induces…

US: New mycorrhizal product specifically designed for horticulture injection systems

Many of the ornamental horticulture and turf product line innovations recently developed by Mycorrhizal Applications have been sparked by direct requests from the market, especially from growers themselves and/or the distributors who serve ornamental horticulturists. MycoApply Injector Endo, the latest…

Nutrient monitoring of annual salvia

Annual salvia requires low to medium fertility levels between 100 and 200 ppm N and an optimal substrate pH ranging from 5.8 to 6.2. Annual salvia can develop both low and high substrate pH disorders. If the substrate pH drifts <5.8, iron (Fe) and manganese can accumulate at toxic levels and observed…

Pursell Agri-Tech and Plant Products team up

Innovative new controlled release fertilizer for the Canadian market

Pursell Agri-Tech and Plant Products have entered into a supply and distribution agreement for the Eastern Canadian market. The addition of PurKote to Plant Products’…

"Human activity means UK peatlands contribute to climate change"

The UK’s peatlands are making a significant contribution to greenhouse gas emissions because of the way they are managed, a major new study has shown. Peatlands occupy 12% of the UK’s land area and store vast quantities of carbon. Healthy peatlands capture carbon dioxide (CO­ 2 ) from the atmosphere and…

Nutrient monitoring of fuchsia

Fuchsia requires low to medium fertility levels between 100 and 200 ppm N. Optimal substrate pH values for fuchsia range from 5.5 to 6.2. Fuchsias can develop both low and high substrate pH disorders. If the substrate pH drifts lower than 5.5, iron (Fe) and manganese accumulate at toxic levels and are observed as lower leaf…

Kenya government apologizes to flower industry for delayed fertilizer clearance process

The Kenya flower industry heads have lauded the government’s move to expedite clearance of fertilizer at the port of Mombasa by reducing the number of clearing agents to four, ensuring that the agricultural inputs get to market in time. by Bob Koigi - bobkoigi@gmail.com This, following complaints from…


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