One of my favourite times for complete lawn weed control is in late August or September whilst there is still some warmth around. I would recommend this if you just need the one application in the year. The reason for this is: Environmentally better because you only apply weedkiller when you need to kill weeds, not every time you feed the grass However, if your lawn is currently inhabited by lots of weeds, a feed and weed probably won’t help. The manufacturer’s recommendations are that once dry the lawn is safe to use. This would take just a few hours in the warmer months.

If you need additional sprays then you can use them in combination and get 3 sprays per annum total, however, if you do need to do this because weeds aren't dying then consider either your procedure, mixing or measurements to be faulty. Weed killers for use on lawns are selective. In other words they kill most broadleaved plants such as clover and that aren’t grass IF used correctly! If they are used incorrectly, for example by being too dilute they won’t control the weeds. If they are over applied they may start to affect the grass. Both contain different chemicals that treat broad-leaved weeds, so if you find that Weedol failed to work on a specific weed species, there’s a good chance that Resolva or Greenforce will do the job.Yes, an amateur weedkiller concentrate might not be as strong as a professional product and that is for reasons of safety. That said, all it means is that you need more concentrate to dilute into water than you would a professional product. After mowing. Leave at least 2 days if applying liquid lawn weed killer to the whole lawn. Don’t mow for a further 3 days If killing weeds before renovation and seeding you ideally need to leave at least 2 months after weed killing and before seeding.

For more information on how to accurately dilute weed killer concentrate, watch this video by The Lawnsmith. Our Fertilisers, unlike grass ‘weed and feed’ products, do not contain pesticides or weed killers. Though the bag of bulk material should be stored safely away from children and pets, the lawn is safe for use by children, wildlife and most domestic pets immediately after application. This type of weedkiller stimulates the hormones in the weeds, causing the cells to grow fast. At first, it appeared that the weeds are getting bigger and taller, but after a few days of this accelerated growth, the cells could no longer sustain themselves, the cell walls then started to collapse, and the weeds started to wilt and die off. I have some weeds in my lawn that Verdone (which is what I have been using for some years) doesn't seem to have killed, and I thought I would try alternating with a different brand, ad I have chosen the one with the "most different ingredients" in the hope that that will have some impact no the weeds that Verdone is leaving behind. That is Resolva Lawn Weedkiller. Allow a choice of ‘active weed killing chemical’. Not all weeds are killed by the same weed killer so two different ones may be required

Even though the weeds were still visible, they were crispy and showing no signs of life with no new offshoots etc. Complaints about the concentrated version were few and far between, but most seemed related to issues with diluting the product correctly. For example, one lady diluted 150ml into water instead of 15ml, which caused scorching to the grass.