Tomato plants

(Question)

Is it ok to plant my tomato plants now May 16th
I live in Niagara falls on
The weather is supposed to be pretty good from now on
No more frost
My plants are about 5″ high with a fair amount of leaves
Mixed varieties of heirloom

(Answer)

Thank you for contacting Toronto Master Gardeners.

Here is a post from our archives that says it all:

This is a common question asked every year.  With the recent warmer  temperatures, everyone is keen to get out and start planting.  It is important to wait until all risk of frost has passed. We recommend on or after Victoria Day weekend as a safe time to plant out your tomato plants.

You can find additional previous responses to your question on our Toronto Master Website:  https://www.torontomastergardeners.ca/index.php/askagardener/when-to-plant-my-tomato-plants/ ),   and at https://www.torontomastergardeners.ca/index.php/askagardener/tomatoes-growing-season/ ).