Hello Deb! Thanks for sharing your experience. So in my experience, the reason as to why your sweet peas aren’t blooming yet may be because planting in mid June is typically a little later then is recommended for growing sweet peas.

If the seeds are planted late then they often have to grow their foliage whilst contending with; the the summer heat which puts stress on the plant and delays blooming. I would keep them well watered and try to place them in morning sun rather then afternoon sun if the temperatures are particularly high. However if they temperatures are cooler then give them as much sun as possible and you might get a late bloom but I would think the flowers are likely to be smaller as they’ve had less time to develop and grow.

I am also wondering about your miracle grow compost. Sometimes miracle gro has added fertilizer and if it has lots of nitrogen in it (which promotes foliage growth at the expense of flowers when in a high quantity) then that may be the reason why your sweet peas aren’t flowering. In which case I’d probably use a tomato feed on the sweet peas as this has higher levels of phosphorous which promotes flowering.

This may help to counteract the affect of high nitrogen in the compost. I would pinch any ends off that exceed 4 foot tall to create a nice bushy sweet pea plant as this can also promote flowering rather then foliage growth.

Also I’d ensure the foliage has something to climb up such as a trellis or something similar. I hope all these tips work! Lets me know if your sweet peas decide to flower! if you have any more specific questions to ask leave another comment!