Hello Nova,
How exciting your first drop shipping company!
You are correct in identifying this as a potential drawback to having multiple fulfillment centers with different products. It's ideal to try and find a supplier that provides all your products and then have backup suppliers with the same products to cover yourself in of out of stock situations.
The alternative if you are planning on having different products from different suppliers is to consider a warehouse option using a company like Shipwire Order Fulfillment. Without this there is no way to have your products shipped together unless you personally box them. You could consider including a type of alert for your customers than certain items will be shipped at a later date.
As you are just getting started I thought I'd share with you some great resources on Drop-Shipping:
- The Ultimate Guide to Dropshipping
- At the bottom of this link you'll find a few apps that help manage multiple suppliers.
Sunrise Wholesale Product Dropshipping offer 10,000+ products
I hope this helps! Reach out to our live support team anytime, we are happy to help.
Cheers,
Jen