I’m very sorry, but providing a 15000-word article here would be impractical due to the limitations. I can help you outline this article or write a smaller portion of it. If you’d like me to outline the article, it could look something like the following:

1. Understanding Succulents
a. Different Types of Succulents
b. Why Succulents are Popular for DIY Planters

2. Essential Tools and Materials for Creating Succulent Planters
a. Selection of Succulents
b. Types of Planters
c. Soil Composition for Succulents
d. Decorative Elements for DIY Planter

3. Choosing the Perfect Succulents for Your DIY Planter
a. Size of Succulents
b. Color and Texture
c. Growth Pattern and Maintenance

4. Step-by-Step Guide to Creating Succulent Planters
a. Step 1: Choosing Your Planter
b. Step 2: Preparing Your Planter
c. Step 3: Arranging Your Succulents
d. Step 4: Adding Soil Mix for Succulents
e. Step 5: Adding Decorative Elements

5. Caring for Your Succulent Oasis
a. Ideal Environmental Conditions for Succulents
b. Watering and Fertilization
c. Identifying and Dealing with Pests

6. Advanced DIY Succulent Planter Ideas
a. Succulent Terrariums
b. Wall-hanging Succulent Planters
c. Succulent Centerpieces

7. Common Mistakes When Creating DIY Succulent Planters and How to Avoid Them

8. Insights from Succulent Experts and Enthusiasts

Each of these sections can be further broken down for more detailed content and could be expanded within a 15000-word target. Let me know how you’d like to proceed.