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Rose Mallow Silver Cup

$4.95

Lavatera Trimestris

  • Seed Count 100
  • Show Stopper
  • Biennial
  • Height 60 cm

 

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Description

Winner of the Royal Horticultural Societyโ€™s prestigious Award Of Garden Merit, Rose Mallow Silver Cup has large hibiscus-like flowers, that are pink with a silver sheen.

It is a fast-growing plant that is well-regarded for its large, showy blooms.

A strong compact plant growing some 60cm tall by 40cm across that is suitable for containers or to plant on mass in garden beds.

Grows in pretty much any soil so long as it gets sunshine and shelter from winds. Plus It makes a great cut flower.

Find your Climate Zone

Method: Sow direct or seedlings
Soil Temp: 10ยฐC - 25ยฐC
Cool Mountain: Nov - Dec
Position: Part sun
Arid: Aug - Jan
Row Spacing: 30 cm
Temperate: Sep-Nov, Mar-Jun
Planting Depth: 3 mm
Sub Tropical: May - Oct
Harvest: 140 Days
Tropical: Jun - Aug
Plant Height: 60 cm

๐ŸŒฑ Sowing Lavatera: In Trays vs. Direct

Lavatera can be started in seed trays or direct sown into the garden, and each method has its place depending on your space, timing, and goals.

Sowing in Trays (Indoor or Protected Start)

Starting in trays is ideal if:

  • You’re planting in early spring and the soil is still cool.
  • You want to give your seedlings a head start in a controlled environment.
  • You want to manage spacing and transplant strong seedlings only.

How-To:

  • Fill trays with a quality seed-raising mix.
  • Sow seeds about 5 mm deep.
  • Keep trays moist and in a warm, bright location (15โ€“21ยฐC is ideal).
  • Germination usually takes 10โ€“21 days.
  • Transplant once seedlings have 2โ€“3 sets of true leaves and the weather has warmedโ€”after last frost in cool areas.

๐ŸŒผ Tip: Lavatera doesnโ€™t love root disturbance, so transplant gently and avoid letting them sit too long in trays.

Direct Sowing in the Garden

Perfect if:

  • You’re in a frost-free zone or it’s late spring.
  • You want to naturalise them in borders or wildflower-style beds.

How-To:

  • Sow seeds directly where they are to grow, 5 mm deep.
  • Water in and keep moist until germination.
  • Thin seedlings to about 30โ€“45 cm apart once theyโ€™re up.

๐ŸŒผ Tip: Sow after the danger of frost has passed. Lavatera likes warm soil and good sunlight to get going.


๐Ÿ” Seed Pre-Treatment

Lavatera seeds do not require pre-treatment like stratification or scarification. Theyโ€™re ready to go straight from the packetโ€”just sow and water!

If you want to give them a boost, a short soak in room-temperature water for a few hours before sowing can help speed up germination, but itโ€™s not essential.


๐Ÿชด Soil & Position

Lavatera is beautifully unfussy, but for best results:

  • Soil: Free-draining, moderately fertile soil is ideal. Theyโ€™ll tolerate poor soils but wonโ€™t thrive in heavy clay unless itโ€™s been improved with compost and sand.
  • pH: Slightly acidic to neutral (6.0โ€“7.5).
  • Position: Full sun is essential. Aim for at least 6 hours of sunlight a day. In partial shade, growth becomes leggy and flowering suffers.
  • Spacing: 30โ€“60 cm apart depending on variety.

๐ŸŒผ Tip: In coastal or windy gardens, a bit of shelter helps prevent snapping or leaning in taller varieties.


๐ŸŒฟ Care & Maintenance

Lavatera grows fast and asks for little. Hereโ€™s how to keep it blooming beautifully:

  • Watering: Water well during establishment, then reduce. Once established, itโ€™s quite drought tolerant. Avoid overwateringโ€”roots hate soggy feet.
  • Feeding: Light feeders. A handful of slow-release fertiliser at planting is plenty. Too much nitrogen = more leaves, fewer flowers.
  • Mulching: Apply mulch around the base to retain moisture and suppress weeds.
  • Pruning: Pinch out the tips of young plants to encourage bushiness. Deadhead spent blooms to keep them flowering longer.
  • Staking: Taller varieties may need support, especially in exposed areas.

๐ŸŒผ Companion Planting Guide

Lavatera is a lovely companion in the flower and veg patch alike.

Great companions:

  • ๐ŸŒป Sunflowers โ€“ share similar growing conditions and attract pollinators.
  • ๐Ÿ Lavender and salvia โ€“ encourage bees and beneficial insects.
  • ๐ŸŒฝ Corn or tomatoes โ€“ Lavatera draws pollinators to increase fruit set.
  • ๐Ÿฅฌ Lettuce and spinach โ€“ benefit from shade created by Lavatera in summer.

Avoid:

  • Plants that need rich, moist soilโ€”like cucumbers or melonsโ€”as they have different needs.

โœ‚๏ธ Harvesting

Lavatera is grown more for beauty than for long vase lifeโ€”but it can be used in arrangements if cut at the right time.

  • For Cut Flowers: Harvest when buds are just opening. Use clean snips and place straight into water.
  • For Garden Enjoyment: Deadhead regularly to prolong flowering, especially in long summers.

๐Ÿ› Common Issues & Fixes

Hereโ€™s a handy table for troubleshooting:

IssueSymptomsFix
Leggy, sparse growthLong stems, few flowersNot enough sun โ€“ move or cut back and wait for regrowth
Powdery mildewWhite powdery coating on leavesImprove airflow, avoid overhead watering, treat with organic fungicide
AphidsSticky leaves, distorted tipsBlast with hose or use insecticidal soap
Drooping or yellowingWater stress (too much or too little)Check drainage and watering schedule
No flowersHealthy growth but no budsToo much nitrogen โ€“ cut back feeding

๐ŸŒพ Seed Saving Guide

How to Save Seed:

  1. Let a few flowers go to seed โ€“ stop deadheading at the end of the season.
  2. Wait for seed pods to dry and turn brown on the plant.
  3. Collect pods on a dry dayโ€”cut whole stems and place in a paper bag.
  4. Dry indoors for 1โ€“2 weeks.
  5. Shell out the seeds and remove any chaff.
  6. Label and store in a cool, dry, dark place in paper envelopes or airtight jars.

๐ŸŒผ Tip: Lavatera can self-seed freely. If you want to control it, collect seeds before they fall.


๐ŸŒธ Final Thoughts

Lavatera is one of those plants that brings effortless joy to the garden. Itโ€™s fast, floral, and flexibleโ€”just the kind of plant that rewards beginner gardeners and fills out a patch with ease. Whether youโ€™re sowing a bee-friendly border, adding soft pastels to your cut flower mix, or simply chasing a bit of garden colour, Lavatera delivers.

If youโ€™re new to seed-starting, this is a perfect one to grow your confidence. And if youโ€™re a seasoned grower, Lavateraโ€™s cheerful charm fits right into a well-planned, pollinator-rich garden.

๐ŸŒฟ Soak in the satisfaction of growing from seed to bloomโ€”Lavatera will be waving her soft petals at you in no time.

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Postage Charge

Orders under $35 attract a $4.95 shipping charge. Orders $35 and above have free shipping.

Order Times

Seed orders are normally dispatched within three business days. You will receive an email when seeds are mailed out.

Postage Days

Seeds are mailed out Tuesday to Friday at 1pm. Except for the Friday of long weekends.

Postage Times

WA 2-3 Days: SA,NT 3-5 Days: NSW, ACT, QLD, VIC: 5-7 Days

Carrier

We use Australia Post Letter Postage for the majority of orders


Not only are our seeds packed in recycled paper envelopes, we keep the theme going when we post out website orders. To protect your seeds from moisture and the letter box munchers (snails), we use a very special plastic free material made from plants. They are then put into recycled mailing envelopes. Green all the way ๐Ÿ’š๐ŸŒฟ


Delivery Guarantee

We take great care to make sure your seeds arrive safely. If your order is lost or damaged in transit, weโ€™ll happily send a replacement. Unfortunately, we canโ€™t replace or refund orders that arrive later than the estimated delivery date, as delays can sometimes occur that are outside our control.

Please note that all dispatch and delivery times listed are estimates only. While we do our best to post promptly, delivery timeframes can vary due to postal service delays, weather events, or other unforeseen circumstances. Weโ€™re unable to take responsibility for any loss, damage, or cost that results from a late delivery.

An order is not considered missing until at least 20 business days have passed from the postage date. Youโ€™ll receive an email once your seeds have been posted, letting you know theyโ€™re on their way. If you donโ€™t see it in your main inbox, please check your Spam or Promotions folders as sometimes our emails like to hide there.