How to Create 30 Days of Social Media Content Using AI Images in posterly

How to Create 30 Days of Social Media Content Using AI Images in posterly

Most content creators know the feeling: it is Sunday evening and you have nothing scheduled for the week. You end up posting something rushed, or not posting at all.

Batching your content fixes this. Instead of creating one post at a time, you set aside a couple of hours once a month and plan everything upfront. The result is a full calendar with consistent visuals, well-written captions, and posts going out at the right times automatically.

This guide walks through how to do exactly that using posterly's AI image generator (powered by Nano Banana) alongside the AI caption tool. By the end of one focused session, you can have 30 unique, on-brand posts ready to go.

Here is what the process looks like:

• Plan your content themes before opening posterly so you know what to generate
• Use AI Images to create original visuals for each theme
• Write AI captions that match each image and the platform it is going to
• Schedule everything at once using the calendar or bulk upload
• Review and adjust before anything goes live

Why AI-Generated Images Change the Game for Content Creators

Stock photos feel generic. Custom design takes hours and usually requires a designer. AI image generation gives you a third option: original, on-brand visuals created from a text description in under 30 seconds.

For a creator or small business running their own social media, this matters a lot. You can now produce a cohesive visual identity without a design budget. Every post can have a unique image that matches the caption rather than whatever stock photo happened to be available.

For teams managing multiple clients, it means you can produce visual content at scale without the bottleneck of a design review process for every single post.

Step 1: Plan Your Content Themes Before You Open posterly

Sitting down to create 30 posts without a plan is how you end up staring at a blank screen for an hour. Spend 15 minutes before your session writing out your content pillars.

A content pillar is a broad topic category that you return to regularly. Most accounts work well with 3 to 5 pillars. For example, a fitness brand might use:

1. Workout tips and tutorials
2. Nutrition and meal ideas
3. Client transformations
4. Motivational content
5. Behind-the-scenes studio content

Once you have your pillars, plan roughly how many posts each gets per month. If you are posting once a day, you might give each pillar 6 posts, with a few promotional posts mixed in.

Write out a simple list like this:

Week	Theme	Platform	Post Type
Week 1	Workout tips	Instagram	Image
Week 1	Client win	LinkedIn	Image
Week 2	Nutrition	Instagram	Carousel
Week 2	Motivation	X	Text

You do not need to fill out every detail. The goal is to have enough direction that you know what images to generate.

Step 2: Generate Your Images With AI Images in posterly

Once you have your plan, go to AI Images in your posterly dashboard.

The AI image tool (Nano Banana) works from a text prompt. You describe the image you want, choose a style, and it generates it. A good prompt is specific about:

• The subject and what it is doing
• The mood or feeling you want to convey
• Any specific colours or visual style
• The aspect ratio you need

Writing Good Prompts

Vague prompts produce vague results. Compare these two:

Vague: "A person working out"

Specific: "A woman lifting weights in a modern gym, natural window light, clean minimal background, warm tones, photo-realistic style"

The second prompt gives the AI enough to work with. It knows the subject, the environment, the lighting, and the visual style.

For the fitness brand example above, a set of prompts for Week 1 might look like:

• "Close-up of a person tying their running shoes before a morning run, golden hour light, photo-realistic, horizontal format"
• "Overhead shot of a healthy meal prep scene with colourful vegetables in glass containers, bright natural light, minimal food photography style"
• "A coach high-fiving a client at the end of a workout, gym setting, candid and authentic, warm tones"

Choosing a Style

posterly's AI image tool offers several style presets including photo-realistic, illustration, minimal, and others. For social media, photo-realistic works well for lifestyle and product content. Illustration and minimal work well for quote graphics, tips, or informational posts.

Stick to one or two styles per account so your feed looks cohesive. Mixing five different visual styles makes your profile feel inconsistent.

Aspect Ratio

Match the aspect ratio to the platform and post type:

• Square (1:1): Instagram feed, Facebook
• Portrait (4:5 or 9:16): Instagram Reels cover, TikTok, Pinterest
• Landscape (16:9): YouTube thumbnails, LinkedIn, X/Twitter

Generate your images and they will be saved automatically in your AI Images history. You can come back to them at any time.

Step 3: Write Captions Using AI Captions

With your images generated, open the Composer and start building your posts.

For each post, attach the image you generated and then use AI Captions to write the caption. The AI caption tool is platform-aware, meaning it adjusts tone and length based on where the post is going.

A LinkedIn caption tends to be more professional and conversational, with a clear hook and a call to action. An Instagram caption might be shorter, use line breaks for readability, and end with a hashtag block. X posts stay concise and punchy.

You can tell the AI what the post is about and ask for a specific tone. For example:

"Write an Instagram caption for a post about meal prep tips. Tone should be encouraging and practical. Include 5 relevant hashtags at the end."

Review what it generates and tweak anything that does not sound like your brand. The more posts you create, the more the AI learns your writing style through your brand profile in posterly.

Tips for Faster Caption Writing

Create one post, then duplicate it. If you are posting the same content to multiple platforms, create the post once and duplicate it. Then edit the caption for each platform's tone without rebuilding the post from scratch.

Use labels to stay organised. Tag posts with your content pillar names (Workout Tips, Nutrition, etc.) using posterly's Labels feature. This makes it easy to see at a glance whether your month is balanced across all themes.

Write captions in batches. Rather than writing one caption, scheduling it, then moving to the next, build up 5 to 10 posts in draft mode first. This keeps you in a writing mindset rather than constantly switching between creating and scheduling.

Step 4: Schedule Everything

Once you have built your posts in draft mode, it is time to put them on the calendar.

Option A: Schedule Individually With the Calendar View

Open the Calendar view and drag each draft post to its target date and time. The calendar gives you a visual overview of your entire month so you can spot gaps and avoid clustering too many posts on the same day.

For best results, use the Next Available button in the Composer instead of picking a time manually. It finds the next open slot for that account with at least a 1-hour gap from surrounding posts, so you avoid posting too frequently.

Option B: Bulk Upload With a CSV

If you prefer to plan everything in a spreadsheet first, posterly's Bulk Upload feature lets you upload a CSV with all your posts in one go.

Your CSV needs four columns: caption, scheduled_at, account, and optionally media_url. If your images are hosted somewhere accessible (like a public Supabase bucket or cloud storage), you can include the URL and posterly will pull them in automatically.

The bulk upload route works particularly well if you are a team or agency managing content across multiple clients. You can prepare a full month in a spreadsheet, review it with the team, and upload it in one click.

Using the AI Scheduler

For timing, you do not have to guess when your audience is most active. The AI Scheduler analyses your account's posting history and engagement patterns to suggest the best times to post.

In the AI Agent chat, you can say:

"Schedule my 30 draft posts across this month at the best times for each account."

It will distribute them across the calendar, avoid overloading any single day, and confirm the schedule with you before finalising anything.

Step 5: Review Your Calendar Before Anything Goes Live

Before closing the session, spend 10 minutes reviewing the month in Calendar view.

Check for:

• Any day with no posts (gaps you might want to fill)
• Any day with too many posts (more than 2 per platform is usually too much)
• Captions that feel off after a day away from them
• Images that look inconsistent with the rest of the feed

This review step is where the Grid Planner feature is useful. It shows you a visual preview of how your Instagram feed will look before posts go live, so you can reorder or swap images if the layout feels off.

Once everything looks good, your month is done. Every post is in the queue, scheduled, and will publish automatically.

What 30 Days of AI Content Actually Costs

posterly uses a credit system for AI features. Image generation and AI captions both consume credits, but the amounts are small. A typical month of 30 posts with one AI image and one AI caption each is well within the monthly credit allowance on the standard plan.

You can check your credit balance and usage history in Dashboard > Account. If you need more credits, top-ups are available or you can upgrade your plan.

Frequently Asked Questions

How long does it take to generate one AI image?

Most images generate in 10 to 30 seconds depending on complexity. Generating 30 images takes roughly 10 to 15 minutes of active time, most of which is spent writing prompts.

Can I use AI images on all platforms?

Yes. Images generated in posterly can be used on any platform you have connected, including Instagram, Facebook, LinkedIn, X, Pinterest, TikTok, and others. Make sure you choose the right aspect ratio for the platform when generating.

What if I do not like the first image the AI generates?

You can click Generate again with the same prompt to get a different result, or refine the prompt and try again. All generated images are saved in your AI Images history, so you can compare versions and pick the best one.

Can I batch-create posts for multiple clients at once?

Yes. If you are managing multiple clients in posterly, you can switch between client groups within the same workspace. Generate images and schedule posts for each client in separate sessions, keeping everything organised by client group.

Is the content original or could another user get the same image?

AI image generation is non-deterministic, meaning the same prompt will produce different results each time. The images generated are unique to your session and are not shared with other users.