Roehampton Garden Society

May jobs on your allotment

Pea Frame

  • Hand weed and hoe regularly to keep on top of weeds. (Chickweed will produce 2,000 seeds per plant per season if left untouched!)
  • Keep the soil in good condition. Add garden compost or well-rotted manure to maintain soil structure and retain moisture and nutrients.
  • Sow fast-growing green manure where there are areas of bare soil where summer or autumn vegetables are to be planted out. Dug in before July it will fix nitrogen in the soil.
  • Plant comfrey.  The leaves can be used as a compost activator, as well as a making an excellent liquid feed.
  • Keep adding to the compost heap, making sure to mix ‘greens’ (lawn cuttings etc) with ‘browns’ (ripped cardboard, straw etc)
  • Continue to mow grass paths.
    • Strimmer is available to borrow in store. Charge £1.00.  Contact rgs.sw15@gmail.com to book.
    • Lawnmowers, free to borrow, are stored in the toilets on both sites.
  • Earth up potatoes when shoots are approx. 9 inches to prevent green tubers, pulling the earth up with a rake to form peaked rows. Remove any cold-damaged foliage.
  • Watch out for early summer dryness. Recently planted trees, shrubs and fruit need regular watering for the first two growing seasons.
  • Remove raspberry suckers encroaching onto paths or between rows.
  • Sow salad crops successionally, including radishes, spinach and beetroot and herbs such as basil, coriander and parsley.
  • Sow cauliflowers, sprouting broccoli, Brussels sprouts and leeks for harvesting next winter.
  • Sow sweet corn, French and runner beans direct into the soil.
  • Sow carrots.  Use insect mesh to protect from carrot fly.
  • Make late sowings of peas by the end of the month.
  • Prepare a fine seedbed and sow flowering annuals to attract pollinating insects.
  • Plant out tomatoes towards the end of the month watching out for drops in nighttime temperatures below 12 degrees C.  Be ready to put protection such as fleece or cloches around plants on cold nights.
  • Sow pumpkins, squashes and outdoor cucumbers under cover now or outdoors towards the end of the month. Watch for cold nights.
  • Start hardening off tender plants for planting out at the end of the month.
  • Ventilate greenhouses on warm days and cover vulnerable plants with fleece if cold nights are forecast. Apply shading to prevent scorching of plants.
  • Place straw under strawberries to keep fruit clean and deter slug damage. Feed with tomato fertiliser every week.
  • Support broad beans with string attached to stakes. Watch out for blackfly on broad beans and rub off or wash off with squirted water. Pinch off the tips with blackfly above the flowers and bury in the compost heap.
  • Net cherry trees against birds.
  • Harvest stems of established rhubarb when the stalk reaches 9-12 in. Pull (do not cut) stalks, taking no more than half at any one time.
  • Inspect gooseberries for signs of sawfly damage. Pick off by hand.
  • Start harvesting established asparagus.

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