I need to remove a large (7ft) conifer tree from my front garden, as it is sucking all the goodness from the soil and has killed a nearby shrub. I would like to know if anything else can be planted in its place after it has been removed. I am concerned that nothing else will grow there again. Thank you.
The simplest, and in the long run least expensive move is to test the soil at your state extension service. Tests run $10-25 depending on state and give a wealth of information such as nutrient levels, amount of organic material, type of soil and pH. If there are deficiencies, it will tell you exactly how to correct them. There is sure to be a plant that will grow in that space. Knowing the pH and type of soil will make it easier to find a plant that will do well. While you are at your state's extension service website to order your soil test, look for their recommendations for what grows well in your area. Enjoy your new planting!
I do not have a photo Mrs Ayre
They will usually seek water for themselves, but if it gets so dry that it starts turning brown then it wouldn't hurt to water them. You want them to extend roots down into the soil, and this requires being dry, but you do not want to kill them. This will just have to be monitored closely.
I have 6 lemon scented conifers and while they continue to grow they have all at some time browned off as if dying but tend to partially recover. Can you tell me what the problem is
I suspect "cypress canker", a fungal disease.
There is no direct cure, but suppression of the advance of the disease may be achieved by good soil fertility and water management.
A local consulting arborist or public agency may help you with definitive diagnosis and treatment recommendations.
I'm from Portland Oregon.
Now is a good time to plant. Winter is your rainy season, right? This gives the tree a chance to establish roots before the dry season next summer. It is vital when planting trees to put them in at the right depth. Even though you purchased them, don't assume they are properly situated. Google "show me your flare". If these are in containers, water well a day ahead; try to straighten roots. Some experts recommend hosing off the soil so you get a real good look at the roots. It is better to prune a root than to leave an encircling root intact. There are online videos from universities on how to plant trees.
On the neighbours side of the fence is a row of large, well-established conifers. Plants on my side struggle to survive due, I believe to the conifers taking all the moisture and nutrients. Is there anything I can do to improve the soil and what plants will thrive best in these conditions. The site on my side is open and sunny.
Without knowing the exact conifer in question, it will be difficult to say if there is any allelopathy going on. What I can say with some certainty is that the soil is more than likely very acidic. This is likely the reason that hardly anything will grow there.
What you can do is choose plants that will tolerate acidic soil. This article will help: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/acid-loving-plants.htm
Should I look to add any special additive to the soil to eradicate the remnants of the conifers?
Yes, Dolomitic lime will help to bring the pH back up, and compost will help to bring the fertility back up. These two will usually correct the soil for planting, but you will want to have your soil tested to see how much you will need to bring it back between 6.5 and 7.
This link will help you to find the closest extension service to you for soil testing: https://www.gardeningknowhow.com/extension-search
His garden gets a lot of sun and can be quite windy. It also needs to be dog friendly. Needs to be easy maintenance
You have a fairly warm climate. Here are some suggestions:
https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-9-10-11/zone-9-hedges.htm