As the spring sunshine warms our hearts and our gardens , I feel this great urge to plant seeds. Planting seeds of all shapes and sizes is the promise of regeneration, of new beginnings and fresh starts.

They are usually bought, sometimes saved from last year, and even plundered from the fruit bowl.

At the primary school gardening club in Hammersmith , there has been much excitement about planting rocket seeds - teeny weeny seeds.

The RHS has organised a nationwide, scientific experiment linked with International Space Station to plant rocket seed, which has travelled to space with Tim Peake. Or has it?

We had two packets, one red and one blue. Which has been to space? All will be revealed at the end of May. The children have been most engaged and vigilant watering is taking place.

We have also been planting larger seeds too, sunflowers, and pomegranates even avocados with some success. A book called Plants from Pips by Holly Farrell has inspired us to take a look at some of the fruit and vegetables around us and see what we can grow.

Pomegranates and avocados make great indoor plants too. Just wash off the fruit flesh and either plant straight away or let them dry out to plant later.

With the pomegranate, take a few of the jewel-like seeds and sow in small pots of compost. You can seal the pot in a plastic bag or just put it on a sunny windowsill to germinate in five to 10 days.

For avocados, I just put three cocktail sticks about a third of the way up the stone or pip and balance this on a jar of water so the tip points upward and the bottom, flatter area is touching the water.

It is fascinating to watch the seed open up and the root and shoot emerge. My plants have got positively triffid like so I have pruned the tip to produce a more bushy plant.

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While I find rocket, carrot and beetroot seeds quite small and fiddly, they are fine for the children's nimble little fingers.

The young helpers in the garden are so enthusiastic and their natural affinity with nature, adds a zest and fun to all gardening projects. My friend Betsy has just planted up a container with her granddaughter Eloise.

My son has gone for carrot planting this year on his own small plot on my allotment and even my teenage daughter helped sow potatoes - pink fir apple - this weekend, a welcome half hour break from homework and revision.

The delight of sowing seeds is that it can be a small project lasting 15 minutes. It also allows the imagination to spark and wonder what might be.

And seeds do come in all shapes and sizes. Just pushing some Nasturtium seeds into containers or beds will add a splash of orange to the garden. And "woodland" seeds work well in shady areas, under canopies of trees and shrubs.

For more information and tips, head to the Sarah Heaton Gardens website .