Collective Arisaemas in Display Gardens and for sale in the Nursery

Email Pete for seed and bulb list availability

ARISAEMA

Peter Mahnke’s facts and findings of growing arisaema in S.W. Washington, U.S.A., zone 7 with a micro climate of zone 8.

• Have seed heads picked up before the temperature dips below 32 degrees F whether the heads are green or ripe red.  Seed loss will occur, especially  in         A. speciosum, var. ‘Mirabile’ and ‘Ziro’
• After winter die-back, remove decayed pseudostem.  Fill in and mulch over the hole where the pseudostem was to prevent slug hibernation and egg laying, and to keep excessive moisture from settling on the bulb.  But arisaema bulbs should never totally dry out for long periods of time, or they risk dieing of desiccation.
• If arisaema bulbs are received dry, rather than moss wrapped, they do better planted directly into the ground, rather than potted.
• Placement marking with stick tags will keep you from losing track of bulbs during the winter, and troweling a  bulb as you dig for a spot for some other material.
• If new shoots are damaged by late frost, environmental impacts or probing tools and fingers, leaf tip damage can occur.  Generally, it will not affect the spathe, except in varieties that flower before the leaves unfold.
• Each season, it takes looking time, to tune back into spotting second year plus pseudostems as they emerge in early season.
• Tuber offsets emerge as a small pseudostem, but sown seed out in the garden will emerge as a first year aerial blade known as an eophylls.  Care must be taken during weeding to not pull out the first year aerial blades.  Adding extra soil to support reaching aerial blade stems will help protect against heavy rains and small environmental impacts.
• Ariseaema varieties that will grow in full sun will tend to reach and flop in too heavy of shade.  They will need a support.  This indicator will tell you that this bulb can relocate to the brighter edge.  But, if seasonal growth is good, and off –sets begin to appear, this may be a good base colony site, and it would be best to just move some offshoots away from trial elsewhere.
• As your collection grows so will your successes and failures on placement choices.  You will get used to some disappointments, because it goes with the territory.
• In this seventh year of growing arisaema in my garden, I was thrilled to be able to stand in one spot, turn 360 degrees around and see 123 arisaemas of some ten different varieties.

Arisaema angustatum var. peninsulae f. variegata HC 970197  

Arisaema angustatum var. serratum

Arisaema bathycoleum

Arisaema brevipes

Arisaema candidissimum jagged leaf form

Arisaema candidissimum pink flower form

Arisaema candidissimum white flower form  

Arisaema candidissimun var.

Arisaema ciliatum  

Arisaema clavatum

Arisaema coenobialis

Arisaema concinnum DJHC 579

Arisaema concinnum DJHC 727

Arisaema consanguineum

Arisaema costatum  

Arisaema decipiens

Arisaema dilatatum

Arisaema du-bois-reymondiae

Arisaema elephas  

Arisaema erubescens var.

Arisaema erubescen var. 1

Arisaema erubescen var. 2

Arisaema erubescen var. 5

Arisaema erubecen var. 7

Arisaema fargesii

Arisaema flavum

Arisaema formosanum BSWJ 3644

Arisaema franchetianum DJHC 445

Arisaema griffithii

Arisaema griffithii var. verrucosum red spathe

Arisaema handelii flannel purple leaf form

Arisaema inkiangense var. maculatum purple form

Arisaema intermedium HWJCM 080

Arisaema jinshajiangense

Arisaema kelung – insularis BSWJ 3204

Arisaema kelung– insularis BSWJ 3704  

Arisaema lingyunense

Arisaema lobatum

Arisaema multisestum

Arisaema nepenthoides

Arisaema propinguum

Arisaema rhombiforme

Arisaema robustum HC 970183

Arisaema sauromatums  

Arisaema saxatile

Arisaema sikokianum

Arisaema sikokianum HC 970572

Arisaema sikokianum var. henryanum

Arisaema sp. 1  

Arisaema sp. 3  

Arisaema sp. 4  

Arisaema sp. 8

Arisaema sp. 9

Arisaema sp. 11

Arisaema sp. 12

Arisaema sp. 13

Arisaema sp. 14

Arisaema sp. 16 black flower form  

Arisaema sp. 21

Arisaema sp. 22

Arisaema sp. 23

Arisaema sp. 24

Arisaema sp. 25

Arisaema sp. 26

Arisaema sp. 29  

Arisaema sp. 30

Arisaema sp. 32

Arisaema sp. 38

Arisaema sp. 85  

Arisaema sp. aff. concinnum DJHC 716

Arisaema speciosum

Arisaema taiwanense

Arisaema tortuosum HC 46367

Arisaema triphyllum

Arisaema wilsonii

Arisaema yamatense var. sugimotoi  

Arisaema yunnanense

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