How to build a raised garden bed with seating?

[nvelaga]

Hello experts, 

I am total beginner and planning to step up my DIY journey.  

I am planning to setup a raised garden bed with seating options in couple of places. Along with it i am planning to install part of my back yard with decking ( deck with will be partly on concrete slab ). I have attached my plan and the sample raised bed i am considering. 

I am looking for suggestions on how should i plan the project , tools needed and procure materials ? I am finding lot of information over internet and its confusing. 

Thanks in advance

 

[nvelaga]

thanks @JacobZ ,

if we need to use posts, does these suffice ? 100 x 100mm 2.4m Post H4 Treated Pine Sawn CCA - 2.4m , i think we need to cut them into half. 

Let's say i have used, retain-it posts. Is it easy to cover those with merbu cladding ? 

[JacobZ]

Hi @nvelaga,

If you need to use timber posts, anything that is H4-treated will work. The posts you have linked to are a good option, but they will not be the same colour as the sleepers. You can use a sleeper as a post, you'll just have to dig the hole wider to accommodate it.

If you use the Retain-It posts, cladding them with merbau will hide them extremely well and is a great way of doing it. There might be a very slight bulge where the merbau crosses the posts, but you can cut a shallow rebate in the back of the merbau board before attaching them to remove this bulge. 

Let me know if you have any further questions.

Jacob

[nvelaga]

Thanks @JacobZ , i am thinking to use the posts inside as shown in the community project - so that posts will be inside and hidden. 

Would you be able to guide me on below 

1. Timber screws that are needed 

2. Does 600 mm depth sufficient ? 

3. Do we need to coat those posts with rubber paint ? 

4. Diameter of the post hole ?