Posted: 15/02/2016 at 17:09
Frankie 6 - this is a lovely idea but please, for your own sanity, do rein in your friend's expectations of what you may or may not be able to produce.
I am seriously not trying to be a killjoy but, trying to time flowers to coincide with an event such as this is difficult - especially if you do not have any special facilities to hold back or bring on the flowers if the weather doesn't play ball. The timing of flowering will depend so much on whether or not we have a cold or warm spring.
Please make sure she knows this and has a back up plan to get some flowers from another source if things don't go to plan.
That said I would suggest you buy some perennials to grow this year so they will be more substantial plants next year and producing more blooms. I would consider buying several largeish plants of alchemilla mollis for their lovely greeny / yellow froth of flowers - a good filler. Largeish delphinium plants bought this year and grown on will probably produce several spikes each next summer.
I would also look at larkspur, sweet peas, ammi major along with the other plants suggested before. Don't forget that hardy annuals sown in the autumn (such as sweet peas) will be a bit more reliable for producing flowers in July. Early sown cosmos & stocks should be ok if the colours are suitable.
I suggest you have a good browse through Sarah Raven's website - she has some lovely combinations to give you ideas for seeds etc