Yes but it would be best to split them up into larger Blocks such as 150k each Block to Stake. You would gain 5000 Coins per Block that you Stake plus the fees included in the Block.
could you tell me how to do that step by step how to do it no thanks
Sorry for the late reply,
Go to "options" then "display" tab and check "display coin control (experts only)" and hit apply
Then go to "send coins" and click on "inputs" and you will see a list of all your addresses and can expand each address to see all of your Blocks in that address.
Select the Blocks you wish to combine and send them to an address of yours or create a new address in your address book.
Let me know if you are still having any troubles.