Do you need to originate sunflower in Illinois , but do n’t know when to implant them ?
Planting sunflower is not as promiscuous as it seems .
Here ’s why :

So if you engraft them alfresco too early on in the spring they will cash in one’s chips . And if you plant them too belatedly , your sunflower wo n’t acquire a bloom .
Today , I ’m give way to teach you the idealistic time to implant helianthus in Illinois :
When to Plant Sunflower in Illinois
As you may have already guessed , you need to pay very close attention to your local weather in the leap . Specifically , you are going to need to watch when the last hoarfrost fall out .
In general , when there has n’t been a Robert Lee Frost for two weeks , you are SAFE to plant your helianthus outside in Illinois !
For your reference , I have make this table for average Robert Frost day of the month for most major cities in Illinois . If your city is not lean below you may find its Last & First Frost DatesHERE .

Illinois Last & First Frost Dates
unluckily , Mother Nature plays cruel tricks on us every year .
It should be noted that the above date are just averages .
There are years when the last frost comesMUCHlater . Sometimes , the last frost happens much earlier and you’re able to get your sunflower planted outside in Illinois much faster .

Like I said before , you need to be very diligent in checking your local conditions .
So what happens if a frost comes AFTER you institute your sunflower ?
When you know a frost is add up you necessitate to take activeness .
Also , make trusted not to plant your sunflower in your garden too tardily .
When Should You Start Your Sunflower Seeds Indoors?
depend on the type of helianthus , it take just about 10 to 14 days to grow sunflower from cum indoors and then transplant them to your garden . And then another 12 to 18 weeks to bloom !
For aspecific datethat you should begin sunflower seeds indoors you should :
Not only this , but I commend again paying close-fitting attention to your local weather story .
It should also be noted that the proficient technique for bringing your sunflower plants outside is to introduce them ( in their potty ) outside for an hour . And then increase the amount of clock time they spend outside each day by an hour until they have been out of doors for 8 hours .
This will “ temper ” your sunflower plant , increasing its fortune of fighting off diseases , insects , droughts , and wet weather condition .
If you need to learnWHENto plantANYFlower in Illinois , channelize over toHEREand just eccentric in the bloom you want to grow .