Download the Toolkit: Weed Control in Ornamentals - Jan 2021 - English[1].pdf

Download the full Technical Advice Sheet:  Weed Control in Ornamentals



Cultural Control – Prevention is Better Than Cure

Your first line of defence against weeds should be cultural controls; no herbicide programmed will work effectively without good nursery hygiene. Any established weeds around the crop that are allowed to set seed will create huge pressure that can reduce the effectiveness of herbicides. Non-crop areas and paths should be kept clean and free of weeds that could run to seed.

Past work has shown that a little-and-often approach with a weekly hand weeding routine is more effective and requires fewer labour inputs overall compared with a periodic purge; the ultimate aim should be to avoid any weed setting seed. In production areas plug and liners should be kept clean, and remove all weeds prior to potting. Woven plastic bed covers (e.g. MyPex) should be maintained and replaced when required. Beds should be well draining to help kept them clear of liverwort and moss, helping to prevent further weed establishment.

Gravel or sand beds can be sprayed with residual herbicides like Chikara prior to standing crops down on beds.  Chikara can give up to five months residual weed control, as a rule of thumb most residual herbicides persist for up to twelve weeks. Plan your irrigation schedule to maintain a dry regimen and avoid excess irrigation to reduce leaching of residual herbicides and reduce the weed pressure for species like willows (Salix) that require damp surfaces to germinate.

Keep old and new stock separate as older stock generally has a heavier weed burden which can easily spread. You may also wish to consider how long you wish to retain old stock as the costs of cleaning up older stock can outweigh the costs of disposal and starting from scratch.

The full technical advice sheet can be downloaded below.

Related Pages

Tyfu Cymru Ornamentals network 2022 Spray Programme for disease prevention and control

This spray programme has been written for ornamental crops, products included within it can legally be used in both the production of outdoor and protected ornamentals.

5/26/2022 3:37:47 PM

Webinar: IPDM Review of the Season - Ornamentals

An opportunity to review progress with an integrated approach to pest and disease management, hearing from the group on success and challenges.

1/21/2022 4:39:52 PM

Webinar: IPDM Ornamental Crops: April and early Spring pest management

Tyfu Cymru's Integrated Pest and Disease Management Network provides training on the recognition of pest, diseases and beneficial insects and will help growers to determine current pest and disease pressures and the need for their prevention and cont…

10/22/2021 2:35:16 PM

Webinar: Limiting the impact of common Summer Pathogens

In the 4th session the Ornamental group lead by David Talbot we looked at limiting the impact of common Summer Pathogens and Vine Weevil.

6/18/2021 2:07:03 PM

Webinar: IPDM Biological Controls - Ornamentals

The second session of the IPDM network focused on biological controls for the coming season with tips on which predators to introduce and when, plus rates of introduction for prevention and control of key pests within crops. Including tips on the IPM…

5/7/2021 4:04:24 PM

Tyfu Cymru Ornamentals network 2021 Spray Programme for disease prevention and control

This spray programme has been written for ornamental crops, products included within it can legally be used in both the production of outdoor and protected ornamentals.

3/31/2021 4:46:47 PM

Webinar: Tyfu Cymru: Flower Network - Soil Health and how to unlock nutrients for flowers

Elizabeth Stockdale currently leads the Soil Biology and Soil Health Partnership funded by AHDB and BBRO. In this seminar she draws on the findings from a range of sectors to draw out key principles for flower growers; and also share some of the spec…

2/24/2021 1:24:32 PM

Webinar: Propagation methods and systems for Ornamentals

Traditionally ornamentals producers used to propagate much of their own stock, however in recent years some growers have become plant finishers; buying in all of their young plant material. The bedding sector in particular has specialist young plant…

1/25/2021 3:37:38 PM

Webinar - Daffodil Crop Protection

The webinar covers the latest updates and best practice for plant protection in field daffodil production, with particular focus on disease and weed control. This includes an update on the performance of new and existing herbicides for weed control i…

1/25/2021 3:19:10 PM

Sunflower Webinar

Tyfu Cymru hosted a webinar on sunflowers as there is currently a lot of interest in the crop both from farm tourism pick your own and the cut flower growers. This crop is relatively simple to grow and being a combinable crop has more options for wee…

12/14/2020 11:25:23 AM

Webinar: Weed control in the production of ornamentals

Recent losses of contact herbicides and increased restrictions on the number of applications and rates of remaining residual herbicides has meant that achieving the desired levels of weed control within both field and container grown ornamental crops…

12/14/2020 10:45:49 AM

Technical Advice Sheet: Growing Lavender

Lavender can be a new and unusual crop that can be integrated into a range existing grower holdings, and it can even integrate well with other products such as honey if you have hives on site.

11/16/2020 11:29:37 AM

Webinar: The Flower Farmer's Year

The Flower Farmer’s Year session looks at how Georgie Newbery - the flower farmer and florist who began Common Farm Flowers ten years ago, run their year. They grow about 250,00 stems a year for cutting, they are a retail business and have a very str…

11/13/2020 5:12:22 PM

Technical Advice Sheet: Ornamental Plant Protection

Effective pest and disease control should always begin with cultural controls, and you should plan all your crop management activities on site with pest and disease control in mind. A Dry Regime can be a strong foundation, and can help to limit the i…

9/30/2020 1:33:34 PM

Tyfu Cymru Webinar: Plant Protection in Ornamentals; How, When and Why?

Focusing on pesticide application, how best to apply product to get the best results, how to decide when to start spraying – helping you to decide if it is best to wait until problems occur or should preventative treatments be applied, why we are inc…

8/20/2020 4:20:31 PM

Webinar: Plant Biosecurity

Plant Biosecurity in the Welsh Ornamental Plant Trade - An Overview from Dr David Skydmore. This webinar is one in a series of workshops and webinars comprising Tyfu Cymru’s Plant Health Programme.

8/18/2020 10:37:20 AM

Integrated Pest Management for Commercial Ornamental Growers in Wales

Webinar with David Talbot from ADAS on Integrated Pest Management for commercial ornamental growers in Wales.

6/29/2020 1:56:21 PM

Tyfu Cymru and Charles Dowding Q&A - Part 2: No Dig Methods and Advantages for Intensive Cropping

Charles Dowding joins us for a Q&A session with Welsh commercial growers following his walk through of No Dig Methods and Intensive Cropping in part one of the webinar series.

6/12/2020 5:04:55 PM

Tyfu Cymru and Charles Dowding Webinar Part 1: No Dig Methods and Advantages for Intensive Cropping

In the first part of this webinar Charles presents the benefits of no dig and intensive cropping with an online walk through of no dig growing covering all aspects from no dig polytunnels to planting, composting, multisowing and propagation.

6/12/2020 4:59:52 PM

Welsh Ornamental Growers Immediate Experiences of and responses to COVID-19

This report presents findings from consultation with ornamental plant and cut flower growers in Wales regarding their immediate experiences of and responses to the Covid 19 (C19) crisis.

5/7/2020 10:59:27 AM

Diagnosis in Ornamental Plants

In commercial horticulture, plant pests and diseases (P&D) lead to losses in production and subsequent sales losses. This webinar gives an introduction, for the grower, to some of the more common symptoms caused by pathogens and pests and those produ…

4/7/2020 5:25:47 PM

Plant Health Webinar: Diagnosis in Ornamental Plants

Plant Health Webinar: Diagnosis in Ornamental Plants - an overview. Delivered by Dr David Skydmore

4/7/2020 5:14:22 PM

Soilless Cultivation For Ornamentals

Growing plants without soil is a precise method to deliver water and nutrients to match crop demand; because of the enhanced availability of resource to the root-zone, crops can be grown at a higher density than would be possible in the field.

12/16/2019 1:46:44 PM

Grown not Flown Flowers

The cut flower market can learn a lot from the way the food and drink industry has promoted provenance and local sourcing as a way to tap into the increasing consumer interest in understanding where our food has come from. And it isn’t a huge step fr…

12/16/2019 1:39:34 PM