Question: Hello Ken, I listen to your BBC Essex gardening programme as often as I can and find it very interesting and informative.  I recently heard you mention a lawn moss killer, only available on the internet, but cannot remember its name.  Can you tell mw what it is please, and where I can get it.  Many Thanks, Lynda

Answer:  The moss killer product is called Mo Bacter.  If you put it in a search engine lots of websites will come up.

Question: Hi, can you please tell me how to look after my goji berry. It is small at the moment. It has leaves. Does it flower? Also when does it have fruit? Marion

Answer: Feed the goji berry with ericaceous liquid feed.  If the goji berry has got dead tips, lightly prune in early May and keep well-watered.

Q: I had a new lawn laid in September. It looked lovely all winter but now as it has started to grow 4 or 5 very dark green or grey patches have appeared.  I lifted a small section and underneath I found some grey mould with a very strong smell like mushrooms.  What is this and how do I treat it before it ruins my lawn. Thanks for any help you can give  Mrs JK

A: The dark green patches of lawn could be a number of things, but I suspect its where the soil beneath is more nutritious than other areas. The grey patches most likely are winter damage which could have resulted from fuserium or similar fungal diseases. These were particularly prevalent this winter as a layer of snow encourages their spread beneath.  A feeding will usually get rid of it, but you may have to overseed by using a spring rake, scratch area of surface and apply seed.  As for the grey mould beneath the turf that you describe this is where bacteria is breaking down organic matter, it does sometimes smell mushroomy but is nothing to worry about.

My large white heather bush has developed quite large patches of brown – the rest of the bush looks healthy and is flowering.  Can you help? thanks Lynne

ANSWER:  Have you got a cat or dog who may have relieved themselves on it – or it could be a fox.  That’s what it sounds like has happened to me.

Thanks for answering.  Yes,  I have two dogs who use a bit of the patio area which is washed down nearish to the heather bush.   I do try not to let any of the water get near it.  Also during the very wet spell  my patio and gravel garden were flooded.   Should I remove the dead looking stems out of the bush or leave it alone and see what happens.  By the way enjoy your BBC Essex show.

ANSWER:  You should leave it alone at present for around 3 weeks and then prune out if not shoots come from the base of the dead-looking branches.

Question: Hi Ken i have some box hedges in my garden could you please help me and let me know when is the best time to trim them and how much i can take off the sides.  thank you mike

ANSWER: You can trim the hedges at the end of this month, not before, or beginning of May, as we can still get cold weather, and any fresh growth produced after trimming hedges could then get damaged by frost. Another help for box hedges is to give it a good liquid feed over the top of the foliage at the end of May – this will keep the hedges a good colour (don’t do this during strong sunlight).