Do you want to grow sunflower in Colorado , but do n’t sleep together when to plant them ?
Planting sunflower is not as easy as it seems .
Here ’s why :

So if you plant them outside too early on in the bounce they will die . And if you plant them too tardily , your sunflower wo n’t bring out a flower .
Today , I ’m going to learn you the ideal metre to plant sunflower in Colorado :
When to Plant Sunflower in Colorado
As you may have already opine , you demand to give very skinny attending to your local weather in the give . Specifically , you are move to postulate to watch when the last frost come about .
In general , when there has n’t been a Robert Lee Frost for two week , you are SAFE to plant your sunflower outside in Colorado !
For your reference , I have created this tabular array for modal hoarfrost dates for most major cities in Colorado . If your metropolis is not list below you could find its Last & First Frost DatesHERE .

Colorado Last & First Frost Dates
Unfortunately , Mother Nature plays vicious tricks on us every yr .
It should be observe that the above dates are just averages .
There are years when the last Robert Lee Frost comesMUCHlater . Sometimes , the last hoar happens much in the beginning and you may get your sunflower set alfresco in Colorado much quicker .

Like I say before , you require to be very persevering in check your local weather .
So what happen if a frost do AFTER you constitute your helianthus ?
When you know a frost is coming you demand to take action .
Also , make certain not to plant your sunflower in your garden too deep .
When Should You Start Your Sunflower Seeds Indoors?
calculate on the type of helianthus , it takes roughly 10 to 14 days to grow sunflower from seed indoors and then graft them to your garden . And then another 12 to 18 weeks to bloom !
For aspecific datethat you should start sunflower sow indoors you should :
Not only this , but I recommend again paying near attending to your local weather report .
It should also be noted that the best technique for bringing your sunflower industrial plant out of doors is to introduce them ( in their pots ) outside for an hour . And then increase the amount of time they expend outside each mean solar day by an hour until they have been outside for 8 hour .
This will “ harden ” your helianthus plant life , increasing its chances of fighting off diseases , insects , drouth , and wet conditions .
If you need to learnWHENto plantANYFlower in Colorado , guide over toHEREand just type in the flower you need to grow .